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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

(Mark one)

For the fiscal year ended July 26, 2003

OR

For the transition period from                          to                         

Commission file number 0-18225

CISCO SYSTEMS, INC.

(Exact name of Registrant as specified in its charter)

Registrant’s telephone number, including area code: (408) 526-4000

Securities registered pursuant to Section 12(b) of the Act:     None

Securities registered pursuant to Section 12(g) of the Act:

Common stock, $0.001 par value

Preferred Stock Purchase Rights

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x  No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    ¨

Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2).    Yes  x  No  ¨

Aggregate market value of registrant’s common stock held by non-affiliates of the registrant, based upon the closing price of a share of the registrant’s common stock on January 24, 2003 as reported by the Nasdaq National Market on that date: $97,202,096,519

Number of shares of the registrant’s common stock outstanding as of September 8, 2003: 6,953,996,891

DOCUMENTS INCORPORATED BY REFERENCE

(1)  Portions of the registrant’s Annual Report to Shareholders for its fiscal year ended July 26, 2003 are incorporated by reference into Part I and Part II of this Annual Report on Form 10-K where indicated.

(2)  Portions of the registrant’s Proxy Statement relating to the registrant’s 2003 Annual Meeting of Shareholders, to be held on November 11, 2003, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated.

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This Annual Report on Form 10-K, including the “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” which is incorporated by reference from our 2003 Annual Report to Shareholders, contains forward-looking statements regarding future events and our future results that are based on current expectations, estimates, forecasts, and projections about the industries in which we operate and the beliefs and assumptions of our management. Words such as “expects,” “anticipates,” “targets,” “goals,” “projects,” “intends,” “plans,” “believes,” “seeks,” “estimates,” variations of such words, and similar expressions are intended to identify such forward-looking statements. In addition, any statements that refer to projections of our future financial performance, our anticipated growth and trends in our businesses, and other characterizations of future events or circumstances, are forward-looking statements. Readers are cautioned that these forward-looking statements are only predictions and are subject to risks, uncertainties, and assumptions that are difficult to predict. Therefore, actual results may differ materially and adversely from those expressed in any forward-looking statements. Readers are referred to the risks and uncertainties identified below, under “Risk Factors,” and elsewhere and in the 2003 Annual Report to Shareholders. We undertake no obligation to revise or update any forward-looking statements for any reason.

PART I

General

We manufacture and sell networking and communications products and provide services associated with that equipment and its use. Our products are installed at corporations, public institutions, and telecommunication companies, and commercial businesses, and are also found in personal residences. We provide a broad line of products for transporting data, voice, and video within buildings, across campuses, and around the world. We conduct our business globally and are managed geographically in four segments: the Americas; Europe, the Middle East, and Africa (EMEA); Asia Pacific; and Japan. For information regarding these segments and our revenue derived in each segment, see Note 12 to the Consolidated Financial Statements in our 2003 Annual Report to Shareholders, which is incorporated into this report by reference.

We were incorporated in California in December 1984, and our headquarters is in San Jose. The mailing address of our headquarters is 170 West Tasman Drive, San Jose, California, 95134-1706, and our telephone number at that location is (408) 526-4000. Our Website is www.cisco.com. Through a link on our Investor Relations section of our Website, we make available the following filings as soon as reasonably practicable after they are electronically filed with or furnished to the SEC: our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934. All such filings are available free of charge.

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Products and Services

We sell scalable, standards-based networking products that cover a wide range of customers’ networking needs. Our products and services help customers build their own network infrastructures while providing tools to allow them to communicate with key stakeholders, including customers, prospects, business partners, suppliers and employees.

Our products are used individually or in combinations to connect computing devices to networks or computer networks with each other—whether they are within a building, across a campus, or around the world. Our breadth of product and service offerings enables us to offer a wide range of products and services to meet customer requirements. We also provide products and services that allow customers to transition their various networks to a single multiservice data, voice and video network.

We refer to some of our products and technologies as Advanced Technologies, and we believe some of these Advanced Technologies may grow over time to become material contributors to our overall business. We have currently identified six Advanced Technologies for particular focus: IP telephony, security, optical networking, storage area networking, wireless technology, and home networking, although over time, additional Advanced Technologies may be identified for focus and investment. In addition, investments may be curtailed or eliminated in some presently identified Advanced Technologies depending on market developments and resource allocation decisions.

Over time, we believe that the Internet and the various networks associated with it, including but not limited to corporate intranets, cable, broadband and dialup networks, and voice and video networks, will converge into a “network of networks.” In that environment, we believe successful vendors will be capable of providing an end-to-end spectrum of products aimed not at a particular technology platform but at solutions to networking problems that span all the segments that currently define the industry. As such, many of our strategic initiatives and investments are aimed at meeting the requirements that such a network of networks would demand. For a discussion of the risks associated with that strategy, please see the section of this report entitled “Risk Factors,” including but not limited to the risk factor entitled, “We depend upon the development of new products and enhancements to existing products, and if we fail to predict and respond to emerging technological trends and customers’ changing needs, our operating results and market share may suffer.” For information regarding sales of our major products and services, see Note 12 to the Consolidated Financial Statements in our 2003 Annual Report to Shareholders, which is incorporated into this report by reference.

Our offerings fall into several categories:

Routing

Routing is a foundation technology for computer networking. Routers interconnect computer networks and move information from one network to another. Our routing products offer features to increase security of transmissions and increase efficiency in use of transmission capacity. We offer a broad range of routers, from core backbone infrastructure at large telecommunications

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companies to small and home office deployments. Our routers are also used to interconnect storage networks that can be shared and managed globally.

Switching

Switching is another integral networking technology that is used in both local-area networks (LANs) and wide-area networks (WANs). Our switching products are designed to help users migrate from traditional shared LANs to fully switched networks. Our solutions employ several widely used switching technologies, including Ethernet, Gigabit Ethernet, Token Ring, and Asynchronous Transfer Mode (ATM).

Access

Our access products give remotely located groups and individuals similar levels of connectivity and information access to achieve seamless connections for users whether they are located at a company’s head office, at home, or traveling. Asynchronous and integrated services digital network (ISDN) remote-access routers, dialup access servers, wireless solutions, digital subscriber line (DSL) technologies, and cable universal broadband routers provide telecommuters, mobile workers, students and other users with remote network access.

We offer a broad line of in-building wireless LAN and building-to-building wireless bridging solutions. These solutions include access points, wireless LAN client adapters, bridges, antennas and accessories. Our wireless products are designed to provide high-performance, secure, manageable, and reliable wireless LANs that enable mobility and increase productivity.

Other Products

IP Telephony

We provide IP telephony products for transmitting voice communications over a network using an open, standards-based Internet Protocol (IP). Our IP telephony products use a single network infrastructure for the transmission of data, voice, and video traffic to deliver IP voice and fully integrated communications. IP telephony products provide a seamless migration to full IP communications by interoperating with existing systems.

Security

We provide a broad range of security products and services to protect critical information systems from unauthorized use, defend against attack, and minimize the effect of Internet-borne worms and viruses. As part of our defense-in-depth strategy, we offer numerous network security technologies within our family of routers and switches, in standalone appliances, and as host-based software. Our network security offerings are designed to help ensure the integrity of the information network, simplify operations and lower total cost of ownership.

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Optical Networking

We provide optical networking products for both the enterprise and service provider markets. Our optical networking products provide a variety of functions: service interfaces with a variety of bit rates and options; scaling of customers’ central offices to switch higher-bandwidth services; providing the core of the network where incremental, high-bandwidth channel capacity is required to connect multiple metropolitan markets; and enabling service providers to continue a rapid transition from legacy products to next generation products. Advances in next-generation Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) provide an evolutionary path for telecommunications carriers from their existing infrastructures, as well as giving newer carriers and enterprises the capability to deploy cost-effective, multiservice networks. We also use optical technologies such as dense wave division multiplexing and coarse wave division multiplexing to scale optical bandwidth as high-bandwidth applications, such as Gigabit Ethernet and storage, become more commonplace.

Storage Area Networking

We provide storage networking products that deliver standards-based storage connectivity with intelligent networking features such as multi-protocol/multi-transport integration, virtual storage area networks, advanced security, and sophisticated debug/analysis tools, as well as intelligent storage services, such as network-based virtualization.

Home Networking

Home networking solutions and functionality attempt to replicate the efficiency of enterprise networking in a lower-cost, easy-to-use environment and allow users to share broadband access, music, movies and games throughout the home and over the Internet. The products and solutions include routers, network cards, USB adapters and other products that enable customers to deploy networking in their home or small office environment.

Network Management Software

Our network management offerings are built around CiscoWorks software, a family of management applications based on Internet standards. These applications are designed to enable customers to better secure, monitor and manage large, complex networks. For service providers, Cisco Internet OSS is a foundation and framework designed for next-generation, IP-based services and packet network infrastructure. Cisco Internet OSS provides management enablement of intelligent network services.

Cisco AVVID (Architecture for Voice, Video and Integrated Data) and Cisco IOS^® Software are offered in conjunction with many of our product offerings. Cisco AVVID provides an intelligent network infrastructure for Internet business solutions and consists of several architectural building blocks for key Internet services. Cisco IOS Software is a common networking software platform deployed across a broad spectrum of our products.

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Service

In addition to our product offerings, we provide a broad range of service offerings, including technical support services and advanced services.

Technical support services are designed to help ensure that our products operate efficiently, remain highly available, and benefit from the most up-to-date system software. These services enable customers to protect their network investments and minimize downtime for systems running mission-critical applications.

Advanced services is a comprehensive program that provides responsive, preventive, and consultative support of our technologies for specific networking needs. The advanced services program supports networking devices, applications and complete infrastructures, allowing large organizations and service providers to realize the potential of a multi-service network.

Customers and Markets

Our customers’ networking needs are influenced by numerous factors, including the size of an organization, number and types of computer systems, geographic location, and the applications requiring communications. Our customer base is not concentrated in any particular industry. In each of the past three fiscal years, no single customer has accounted for 10 percent or more of our net sales. Our customers are primarily in the following markets:

Large Enterprise Businesses

Large enterprise businesses are generally defined as organizations with 500 or more employees, located in multiple locations or branch offices, with complex networking needs within a multi-vendor environment for computer systems and IT support infrastructure. Our large enterprise customers span all major industries, including: government, education, retail, finance, health care, manufacturing and transportation. We have developed industry-focused solutions to address specific customer requirements. These solutions include a full range of our core products and advanced technology solutions such as: enterprise routing, switching, security, IP telephony, mobility and storage. In addition, we offer a broad range of value-added services including service and support packages, financing and managed service offerings through our service provider partners.

Service Providers

Service providers offer data, voice, and/or video communication services to businesses, governments, utilities and consumers. They include regional, national and international telecommunications carriers, as well as Internet, cable and wireless service providers. Many service providers resell our products to their own residential, enterprise or commercial customers. Additionally, service providers use a variety of our switching, routing and network management products in their own core networks. Compared to other end-user customers, service provider customers are more likely to require network design services, and their business is characterized by long design cycles.

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Commercial

Commercial customers, primarily small and medium-sized businesses, have fewer than 500 employees and a need for networks of their own, as well as connection to the Internet and to business partners. However, these customers generally have limited resources and expertise in networking technology. Therefore, we attempt to provide products that are affordable and easy to install and use. The commercial market remains an area of potential growth for network adoption and deployment of intelligent network solutions. The emerging technologies, which include network security, mobility and converged voice and data solutions, are of specific interest to small and medium-sized businesses.

Consumer

We participate in the consumer and small office/home office (SOHO) market through our recent acquisition of the business of The Linksys Group, Inc (“Linksys”). Linksys offers several solutions including routers, network cards, USB adapters and other products that enable customers to deploy networking in their homes or small office environments.

Sales Overview

At the end of fiscal 2003, our worldwide sales and marketing organization consisted of approximately 13,000 individuals, including managers, sales representatives and technical support personnel. We have field sales offices in more than 60 countries and sell our products and services both directly and through channel partners with support from our sales force. Channel partners include value-added resellers, system integrators and service providers. These partners sell directly to end customers and often provide system installation, technical support, professional services and support services in addition to the network equipment sale. We also have distributor channel partners who typically sell to smaller value-added resellers. We refer to this as a two-tier system of sales to the end customer. Many distributors also offer service and support to their customers. For more information regarding our channel partners, please see the section of this report entitled “Risk Factors,” including but not limited to the risk factors entitled, “Disruption of or changes in the mix of our product and service distribution model or customer base could harm our sales and margins” and “Our inventory management relating to our sales to distributors is complex, and excess finished goods may harm our gross margins.”

Our service offerings complement our products via a range of consulting, technical, project, quality and maintenance support-level services including 24-hour online and telephone support through technical assistance centers.

Cisco Systems Capital Corporation facilitates and provides lease and other financing to certain qualified customers for the purchase of equipment and other needs. For additional information regarding Cisco Systems Capital Corporation’s financing activities, see Note 6 to the Consolidated Financial Statements in our 2003 Annual Report to Shareholders, which is incorporated into this report by reference.

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Acquisitions, Investments and Alliances

The markets in which we compete require a wide variety of technologies, products and capabilities. The combination of technological complexity and rapid change within our markets make it difficult for a single company to develop all technological solutions that it desires to offer within its family of product and services. Through acquisitions, investments and alliances we are able to deliver a broader range of products and services to customers in target markets.

We employ the following strategies to satisfy the need for new or enhanced networking products and solutions: we develop new technologies and products internally; we enter into joint-development efforts with other companies; we resell other companies’ products; and we acquire all or part of other companies.

Acquisitions

Since 1993, we have acquired several companies and we expect to make future acquisitions. Mergers and acquisitions of high-technology companies are inherently risky, especially if no product has been shipped by the acquired company. No assurance can be given that our previous or future acquisitions will be successful or will not materially adversely affect our financial condition or operating results. Prior acquisitions have resulted in a wide range of outcomes, from successful introduction of new products and technologies to an inability to do so. The risks associated with acquisitions are more fully discussed in the section of this report entitled “Risk Factors,” including but not limited to the risk factor entitled, “We have made and expect to continue to make acquisitions that could disrupt our operations and harm our operating results.”

Investments in Privately Held Companies

We make minority investments in privately held companies that develop technology or provide services that are complementary to our products or provide strategic value. By investing in new ventures, we strengthen our relationships with such companies. The risks associated with these investments are more fully discussed in the section of the report entitled “Risk Factors,” including but not limited to the risk factor entitled, “We are exposed to fluctuations in the market values of our portfolio investments and in interest rates; impairment of our investments could harm our earnings.”

Strategic Alliances

We pursue strategic alliances with other companies in areas where collaboration can produce industry advancement and acceleration of new markets. The objectives and goals for a strategic alliance can include one or more of the following: technology exchange, product and solution development, joint sales and marketing, or new-market creation. Currently, we have strategic alliances with AT&T, BearingPoint, Bell South, Cap Gemini/Ernst & Young, EDS, Hewlett-Packard, IBM, Intel, Italtel, Microsoft, Motorola, SBC and Sprint, among others.

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Backlog

Our backlog at July 26, 2003 was approximately $2.0 billion, compared with a backlog of approximately $2.3 billion at July 27, 2002. Our backlog at September 8, 2003 was approximately $1.6 billion, compared with a backlog of approximately $1.4 billion at September 9, 2002. Backlog includes orders confirmed with a purchase order for products scheduled to be shipped within 90 days to customers with approved credit status. Because of the generally short cycle between order and shipment and occasional customer changes in delivery schedules or cancellation of orders (which are made without significant penalty), we do not believe that our backlog, as of any particular date, is necessarily indicative of actual net sales for any future period.

Competition

We compete in the networking and communications equipment markets, providing products and services for transporting data, voice and video traffic across intranets, extranets, and the Internet. These markets are characterized by rapid change, converging technologies, and a migration to networking solutions that offer superior advantages. These market factors represent both an opportunity and a competitive threat to us. We compete with numerous vendors in each product category. The overall number of our competitors providing niche product solutions may increase. Also, the composition of competitors may change as we increase our activity in our advanced technology markets.

Our competitors include 3Com, Alcatel, Avaya, Avici, Check Point Software, Ciena, Dell, Ericsson, Enterasys, Extreme Networks, Foundry Networks, Fujitsu, Huawei, Juniper, Lucent, NetScreen, Nokia, Nortel Networks, Redback Networks, Riverstone, Siemens AG and Sycamore Networks, among others. Some of these companies compete across many of our product lines, while others are primarily focused in a specific product area. Barriers to entry are relatively low, and new ventures to create products that do or could compete with our products are regularly formed. In addition, several of our competitors may have greater resources, including technical and engineering resources, than we do. As we expand into new markets, we will face competition not only from our existing competitors but from other competitors as well, including existing companies with strong technological, marketing and sales positions in those markets. We also sometimes face competition from resellers and distributors of our products.

The principal competitive factors in the markets in which we presently compete and may compete in the future include:

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We also face competition from customers to whom we license or supply technology and suppliers from whom we transfer technology. The inherent nature of networking requires interoperability. As such, we must cooperate and at the same time compete with many companies. Any inability to effectively manage these complicated relationships with customers and suppliers could have a material adverse effect on our business, operating results, and financial condition and accordingly affect our chances of success.

Research and Development

We regularly seek to introduce new products and features in areas including, among others, data, voice, and video over IP; advanced access and aggregation technologies such as cable, wireless and other broadband technologies; advanced enterprise switching; optical transport; storage networking; content networking; security; network management; and advanced core and edge routing technologies.

The industry in which we compete is subject to rapid technological developments, evolving industry standards, changes in customer requirements, and new product introductions and enhancements. As a result, our success, in part, depends upon our ability, on a cost-effective and timely basis, to continue to enhance our existing products and to develop and introduce new products that improve performance and reduce total cost of ownership. In order to achieve these objectives, our management and engineering personnel work with customers to identify and respond to customer needs, as well as with other innovators of internetworking products, including universities, laboratories, and corporations. We also expect to continue to make acquisitions and investments where appropriate to provide us with access to new technologies. We intend to continue developing products that meet key industry standards and to support important protocol standards as they emerge. Still, there can be no assurance that we will be able to successfully develop products to address new customer requirements and technological changes, or that such products will achieve market acceptance.

Our research and development expenditures were $3.1 billion, $3.4 billion and $3.9 billion in fiscal 2003, 2002 and 2001, respectively. All of our expenditures for research and development costs, as well as in-process research and development of $4 million, $65 million and $855 million in fiscal 2003, 2002 and 2001, respectively, have been expensed as incurred.

Manufacturing

We primarily employ an outsourced manufacturing strategy that relies on contract manufacturers for manufacturing services. Our manufacturing operations primarily consist of quality assurance of materials and components, subassemblies, final assembly and testing of products. We presently use a variety of independent third-party companies to provide services related to printed circuit board assembly, in-circuit test, and product repair as well as product assembly. Proprietary software on electronically programmable memory chips is installed in our systems in order to configure products to customer needs and to maintain quality control and security. The manufacturing process enables us to configure the hardware and software in unique combinations to meet a wide variety of individual customer requirements. We also use automated testing equipment and burn-in procedures, as well as comprehensive inspection,

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testing, and statistical process control that are designed to help ensure the quality and reliability of our products. The manufacturing processes and procedures are generally ISO 9001 or ISO 9003 certified.

Our arrangements with contract manufacturers generally provide for quality, cost and delivery requirements, as well as manufacturing process terms, such as continuity of supply, inventory management, flexibility regarding capacity, quality and cost management, oversight of manufacturing and conditions for use of our intellectual property. We have not entered into any significant long-term contracts with any manufacturing service provider. We generally have the option to renew arrangements on an as needed basis, primarily annually. These arrangements generally do not commit us to purchase any particular amount, or any quantities beyond certain amounts covered by orders or forecasts that we submit covering discrete periods of time.

Patents, Intellectual Property, and Licensing

We seek to establish and maintain our proprietary rights in our technology and products through the use of patents, copyrights, trademarks, and trade secret laws. We have a program to file applications for and obtain patents, copyrights, and trademarks in the United States and in selected foreign countries where we believe filing for such protection is appropriate. We also seek to maintain our trade secrets and confidential information by non-disclosure policies and through the use of appropriate confidentiality agreements. We have obtained a substantial number of patents and trademarks in the United States and in other countries. There can be no assurance, however, that these patents are valid or can be enforced against competitive products in every jurisdiction. Although we believe the protection afforded by our patents, patent applications, copyrights, trademarks and trade secrets has value, the rapidly changing technology in the networking industry and uncertainties in the legal process make our future success dependent primarily on the innovative skills, technological expertise, and management abilities of our employees rather than on the protection afforded by patent, copyright, trademark, and trade secret laws.

Many of our products are designed to include software or other intellectual property licensed from third parties. While it may be necessary in the future to seek or renew licenses relating to various aspects of our products, we believe, based upon past experience and standard industry practice that such licenses generally could be obtained on commercially reasonable terms. Nonetheless, there can be no assurance that the necessary licenses would be available on acceptable terms, if at all. Our inability to obtain certain licenses or other rights or to obtain such licenses or rights on favorable terms, or the need to engage in litigation regarding these matters, could have a material adverse effect on our business, operating results, and financial condition. Moreover, inclusion in our products of software or other intellectual property licensed from third parties on a non-exclusive basis can limit our ability to protect our proprietary rights in our products.

The industry in which we compete is characterized by rapidly changing technology, a large number of patents, and frequent claims and related litigation regarding patent and other intellectual property rights. There can be no assurance that our patents and other proprietary rights will not be challenged, invalidated or circumvented, that others will not assert intellectual property rights to technologies that are relevant to us, or that our rights will give us a competitive

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advantage. In addition, the laws of some foreign countries may not protect our proprietary rights to the same extent as the laws of the United States. The risks associated with patents and intellectual property are more fully discussed in the section of this report entitled “Risk Factors,” including but not limited to the risk factors entitled, “Our proprietary rights may prove difficult to enforce,” “We may be found to infringe on intellectual property rights of others” and “We rely on the availability of third-party licenses.”

Employees

As of July 26, 2003, we had approximately 34,000 employees, including 6,000 in manufacturing and service; 12,000 in engineering; 13,000 in sales and marketing; and 3,000 in finance and administration. Approximately 9,000 employees are in locations outside the United States. We consider the relationships with our employees to be positive. Competition for technical personnel in the industry in which we compete is intense. We believe that our future success depends in part on our continued ability to hire, assimilate, and retain qualified personnel. To date, we believe that we have been successful in recruiting qualified employees, but there is no assurance that we will continue to be successful in the future.

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Risk Factors

Set forth below and elsewhere in this report and in other documents we file with the SEC are risks and uncertainties that could cause actual results to differ materially from the results contemplated by the forward-looking statements contained in this report.

OUR OPERATING RESULTS MAY FLUCTUATE IN FUTURE PERIODS, WHICH MAY ADVERSELY AFFECT OUR STOCK PRICE

Our operating results have been in the past, and will continue to be, subject to quarterly and annual fluctuations as a result of a number of factors. These factors include:

As a consequence, operating results for a particular future period are difficult to predict, and therefore, prior results are not necessarily indicative of results to be expected in future periods. Any of the foregoing factors, or any other factors discussed elsewhere herein, could have a material adverse effect on our business, results of operations, and financial condition that could adversely affect our stock price.

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OUR OPERATING RESULTS MAY BE ADVERSELY AFFECTED BY THE UNCERTAIN GEOPOLITICAL ENVIRONMENT AND UNFAVORABLE ECONOMIC AND MARKET CONDITIONS

Adverse economic conditions worldwide have contributed to slowdowns in the communications and networking industries and may continue to impact our business, resulting in:

Recent turmoil in the geopolitical environment in many parts of the world, including terrorist activities and military actions, particularly the aftermath of the war in Iraq, may continue to put pressure on global economic conditions. If the economic and market conditions in the United States and globally do not improve, or if they deteriorate further, we may continue to experience material adverse impacts on our business, operating results, and financial condition as a consequence of the above factors or otherwise. We do not expect the trend of lower capital spending among service providers to reverse itself in the near term.

OUR REVENUES FOR A PARTICULAR PERIOD ARE DIFFICULT TO PREDICT, AND A SHORTFALL IN REVENUES MAY HARM OUR OPERATING RESULTS

As a result of a variety of factors discussed in this report, our revenues for a particular quarter are difficult to predict. Our net sales may grow at a slower rate than in past periods and, in particular periods, may decline. Our ability to meet financial expectations could also be adversely affected if the nonlinear sales pattern seen in some of our past quarters recurs in future periods. We have experienced periods of time during which shipments exceeded net bookings, leading to nonlinearity in shipping patterns. This can increase costs, as irregular shipment patterns result in periods of underutilized capacity and periods when overtime expenses may be incurred, as well as leading to additional costs arising out of inventory management.

In addition, to improve customer satisfaction, we continue to attempt to reduce our manufacturing lead times, which may result in corresponding reductions in order backlog. A decline in backlog levels could result in more variability and less predictability in our quarter-to-quarter net sales and operating results. Long manufacturing lead times have caused our customers in the past to place the same order multiple times within our various sales channels and cancel the duplicative orders when the product is received, or place orders with other vendors with shorter manufacturing lead times. Such multiple ordering (along with other factors) may cause difficulty in predicting our sales and, as a result, could impair our ability to manage parts inventory effectively.

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We plan our operating expense levels based primarily on forecasted revenue levels. These expenses and the impact of long-term commitments are relatively fixed in the short-term. A shortfall in revenue could lead to operating results being below expectations as we may not be able to quickly reduce these fixed expenses in response to short-term business changes.

Any of the above factors could have a material adverse impact on our operations and financial results.

WE EXPECT THAT GROSS MARGIN VARIABILITY AND OUR RECENT LEVEL OF PRODUCT GROSS MARGIN MAY NOT BE SUSTAINABLE

Although we have experienced increasing product gross margins, our recent level of product gross margins may not be sustainable and may be adversely affected in the future by numerous factors, including but not limited to:

Changes in service gross margin may result from various factors such as changes in the mix between technical support services and advanced services, as well as the timing of technical support service contract initiations and renewals.

DISRUPTION OF OR CHANGES IN THE MIX OF OUR PRODUCTS AND SERVICES DISTRIBUTION MODEL OR CUSTOMER BASE COULD HARM OUR SALES AND MARGINS

If we fail to manage distribution of our products and services properly, or if our distributors’ financial condition or operations weaken, our revenues and gross margins could be adversely affected. Furthermore, a change in the mix of our customers between service provider and

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enterprise, or a change in the mix of direct and indirect sales, could adversely affect our revenues and gross margins.

We use a variety of channels to bring our products and services to our end-user customers, including system integrators, two-tier distributors and direct sales. System integrators integrate our products and services into an overall network solution that they typically resell to an end user. Two-tier distributors stock inventory and sell to resellers who may themselves be system integrators. Direct sales occur to both enterprise accounts and service providers. A substantial portion of our products and services is distributed through our channel partners and the remainder is distributed through direct sales. If sales through indirect channels increase, this may lead to greater difficulty in forecasting the mix of our products, and to a certain degree, the timing of orders from our customers.

Historically, we have seen fluctuations in our gross margins based on changes in the balance of our distribution channels. Although variability to date has not been significant, because each distribution channel has a unique profile, there can be no assurance that changes in the balance of our distribution model in future periods would not have an adverse effect on our gross margins and profitability.

For example:

OUR INVENTORY MANAGEMENT RELATING TO OUR SALES TO DISTRIBUTORS IS COMPLEX, AND EXCESS FINISHED GOODS MAY HARM OUR GROSS MARGINS

We must manage our inventory relating to sales to our distributors effectively. With respect to finished goods, inventory held by our two-tier distributors could affect our results of operations. Distributors may increase orders during periods of product shortages, cancel orders if their inventory is too high, or delay orders in anticipation of new products. Distributors also may adjust their orders in response to the supply of our products and the products of our competitors that are available to the distributor and in response to seasonal fluctuations in end-user demand.

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If we have excess inventory, we may have to reduce our prices and write down inventory, which in turn could result in lower gross margins. Our two-tier distribution channels, in contrast to our one-tier distributors, are given business terms that allow them to return a portion of inventory and participate in various cooperative marketing programs. We recognize revenue to two-tier distributors based on a sell-through method utilizing information provided by our distributors, and we also maintain accruals and allowances for all cooperative marketing and other programs.

SALES TO THE SERVICE PROVIDER MARKET ARE ESPECIALLY VOLATILE, AND CONTINUED DECLINES OR DELAYS IN SALES ORDERS FROM THIS INDUSTRY MAY HARM OUR OPERATING RESULTS AND FINANCIAL CONDITION

Sales to the service provider market have been characterized by large and often sporadic purchases with longer sales cycles. Although we continue to invest in development of new products aimed at this market segment, we have experienced significant decreases in sales to service providers as market conditions have changed. Sales activity in this industry depends upon the stage of completion of expanding network infrastructures, the availability of funding, and the extent that service providers are affected by regulatory, economic and business conditions in the country of operations. Continued declines or delays in orders from this industry could have a material adverse effect on our business, operating results and financial condition. The slowdown in the general economy, over-capacity, changes in the service provider market, and the constraints on capital availability have had a material adverse effect on many of our service provider customers, with numerous such customers going out of business or substantially reducing their expansion plans. These conditions have had a material adverse effect on our business and operating results, and we expect that these conditions may continue for the foreseeable future. Finally, service provider customers typically have longer implementation cycles, require a broader range of service including design services, demand that vendors take on a larger share of risks, often require acceptance provisions which can lead to a delay in revenue recognition, and expect financing from vendors. All these factors can add further risk to business conducted with service providers.

A SHORTAGE OF ADEQUATE COMPONENT SUPPLY OR MANUFACTURING CAPACITY COULD INCREASE OUR COSTS OR CAUSE A DELAY IN OUR ABILITY TO FULFILL ORDERS, AND OUR FAILURE TO ESTIMATE CUSTOMER DEMAND PROPERLY MAY RESULT IN EXCESS OR OBSOLETE COMPONENT SUPPLY THAT COULD ADVERSELY AFFECT OUR GROSS MARGINS

Our growth and ability to meet customer demands depend in part on our ability to obtain timely deliveries of parts from our suppliers. We have experienced component shortages in the past that have adversely affected our operations. We may in the future experience a shortage of certain component parts as a result of strong demand in the industry for those parts or problems experienced by suppliers. If shortages or delays persist, the price of these components may increase, or the components may not be available at all. We may not be able to secure enough components at reasonable prices or of acceptable quality to build new products in a timely

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manner in the quantities or configurations needed. Accordingly, our revenues and gross margins could suffer until other sources can be developed. There can be no assurance that we will not encounter these problems in the future. Although in many cases we use standard parts and components for our products, certain components are presently available only from a single source or limited sources. We may not be able to diversify sources in a timely manner, which could harm our ability to deliver products to customers and seriously impact present and future sales.

We believe that we may be faced with the following challenges going forward:

Manufacturing capacity and component supply constraints could be significant issues for us. We use several contract manufacturers and suppliers to provide manufacturing services for our products. During the normal course of business, in order to reduce manufacturing lead times and ensure adequate component supply, we enter into agreements with certain contract manufacturers and suppliers that allow them to procure inventory based upon criteria as defined by us. If we fail to anticipate customer demand properly, an oversupply of parts could result in excess or obsolete components that could adversely affect our gross margins. For additional information regarding our purchase commitments, see Note 8 to the Consolidated Financial Statements in our 2003 Annual Report to Shareholders. A reduction or interruption in supply, a significant increase in the price of one or more components, a failure to adequately authorize procurement of inventory by our contract manufacturers, or a decrease in demand of products could materially adversely affect our business, operating results and financial condition and could materially damage customer relationships. Furthermore, as a result of binding price or purchase commitments with suppliers, we may be obligated to purchase components at prices that are higher than those available in the current market. In the event that we become committed to purchase components at prices in excess of the current market price when the components are actually utilized, our gross margins could decrease.

The fact that we do not own the bulk of our manufacturing facilities could have an adverse impact on the supply of our products and on operating results. Financial problems of contract manufacturers on whom we rely, or reservation of manufacturing capacity by other companies, inside or outside of our industry, could either limit supply or increase costs.

THE MARKETS IN WHICH WE COMPETE ARE INTENSELY COMPETITIVE, WHICH COULD ADVERSELY AFFECT OUR REVENUE GROWTH

For information regarding our competition, and the risks arising out of the competitive environment in which we operate, see the section entitled “Competition” contained in Item 1 of this report.

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WE DEPEND UPON THE DEVELOPMENT OF NEW PRODUCTS AND ENHANCEMENTS TO EXISTING PRODUCTS, AND IF WE FAIL TO PREDICT AND RESPOND TO EMERGING TECHNOLOGICAL TRENDS AND CUSTOMERS’ CHANGING NEEDS, OUR OPERATING RESULTS AND MARKET SHARE MAY SUFFER

The markets for our products are characterized by rapidly changing technology, evolving industry standards, new product introductions, and evolving methods of building and operating networks. Our operating results depend on our ability to develop and introduce new products into existing and emerging markets and to reduce the production costs of existing products. We believe the Internet and other data, voice and video networks are evolving into a “network of networks,” which will require common technology platforms and broad end-to-end solutions for particular applications rather than products aimed at particular market segments. In that environment, customers will be more concerned with overall solutions rather than with whether the solution is built around a particular technology, such as routing or switching. The process of developing new technology is complex and uncertain, and if we fail to accurately predict customers’ changing needs and emerging technological trends, our business could be harmed. We must commit significant resources to develop new products before knowing whether our investments will result in products the market will accept. In particular, if the “network of networks” model does not emerge as we believe it will, many of our investments may prove to be without value. Furthermore, we may not execute successfully on that vision because of errors in product planning or timing, technical hurdles that we fail to overcome in a timely fashion, or a lack of appropriate resources. This could result in competitors providing those solutions before we do, and loss of market share, revenues and earnings. The success of new products is dependent on several factors, including proper new product definition, component costs, timely completion and introduction of these products, differentiation of new products from those of our competitors, and market acceptance of these products. There can be no assurance that we will successfully identify new product opportunities, develop and bring new products to market in a timely manner, or achieve market acceptance of our products, or that products and technologies developed by others will not render our products or technologies obsolete or noncompetitive. Specifically, the products and technologies that we have identified as “Advanced Technologies” may not prove to have the market success we anticipate, and we may not successfully identify and invest in other advanced technologies that will be important for our future success.

OUR BUSINESS SUBSTANTIALLY DEPENDS UPON THE CONTINUED GROWTH OF THE INTERNET AND INTERNET-BASED SYSTEMS; CHANGES IN INDUSTRY STRUCTURE AND MARKET CONDITIONS COULD LEAD TO DISCONTINUANCES OF CERTAIN OF OUR PRODUCTS OR BUSINESSES

A substantial portion of our business and revenue depends on growth of the Internet and on the deployment of our products by customers that depend on the continued growth of the Internet. As a result of the current economic slowdown and reduction in capital spending, which have particularly affected telecommunications service providers, spending on Internet infrastructure has declined, which has had a material adverse effect on our business. To the extent that the economic slowdown and reduction in capital spending continue to adversely affect spending on

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Internet infrastructure, we could continue to experience material adverse effects on our business, operating results, and financial condition.

Because of the rapid introduction of new products, and changing customer requirements related to matters such as cost-effectiveness and security, we believe that there could be certain performance problems with Internet communications in the future, which could receive a high degree of publicity and visibility. As we are a large supplier of networking products, our business, operating results, and financial condition may be materially adversely affected, regardless of whether or not these problems are due to the performance of our own products. Such an event could also result in a material adverse effect on the market price of our common stock independent of direct effects on our business.

In response to changes in industry and market conditions, we may be required to strategically realign our resources and consider restructuring, disposing of, or otherwise exiting businesses. Any decision to limit investment in or dispose of or otherwise exit businesses may result in the recording of special charges, such as inventory and technology related write-offs, workforce reduction costs, charges relating to consolidation of excess facilities, or claims from third parties who were resellers or users of discontinued products. Our estimates with respect to the useful life or ultimate recoverability of our carrying basis of assets, including purchased intangible assets, could change as a result of such assessments and decisions. Further, our estimates relating to the liabilities for excess facilities are affected by changes in real estate market conditions. Additionally, we are required to perform goodwill impairment tests on an annual basis and between annual tests in certain circumstances. There can be no assurance that future goodwill impairment tests will not result in a charge to earnings.

WE HAVE MADE AND EXPECT TO CONTINUE TO MAKE ACQUISITIONS THAT COULD DISRUPT OUR OPERATIONS AND HARM OUR OPERATING RESULTS

Our growth is dependent upon market growth, our ability to enhance our existing products, and our ability to introduce new products on a timely basis. We intend to continue to address the need to develop new products and enhance existing products through acquisitions of other companies, product lines, technologies and personnel. Acquisitions involve numerous risks, including the following:

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Acquisitions may also cause us to:

Mergers and acquisitions of high-technology companies are inherently risky, and no assurance can be given that our previous or future acquisitions will be successful and will not materially adversely affect our business, operating results or financial condition. Failure to manage and successfully integrate acquisitions we make could harm our business and operating results in a material way. Prior acquisitions have resulted in a wide range of outcomes, from successful introduction of new products and technologies to an inability to do so. Even when an acquired company has already developed and marketed products, there can be no assurance that product enhancements will be made in a timely fashion or that preacquisition due diligence will have identified all possible issues that might arise with respect to such products.

From time to time, we have made acquisitions that result in in-process research and development expenses being charged in an individual quarter. These charges may occur in any particular quarter, resulting in variability in our quarterly earnings.

See also the discussion of risks related to new product development, which also applies to acquisitions, above under the risk factor entitled, “We depend upon the development of new products and enhancements to existing products, and if we fail to predict and respond to emerging technological trends and customers’ changing needs, our operating results and market share may suffer.”

ENTRANCE INTO NEW OR DEVELOPING MARKETS EXPOSES US TO ADDITIONAL COMPETITION AND WILL LIKELY INCREASE DEMANDS ON OUR SERVICE AND SUPPORT OPERATIONS

As we focus on new market opportunities, such as storage, wireless, security, transporting data, voice, and video traffic across the same network, we will increasingly compete with large telecommunications equipment suppliers as well as startup companies. Several of our competitors may have greater resources, including technical and engineering resources, than we do. Additionally, as customers in these markets complete infrastructure deployments, they may require greater levels of service, support and financing than we have provided in the past. Demand for these types of service or financing contracts may increase in the future. There can be no assurance that we can provide products, service, support and financing to effectively compete for these market opportunities. Further, provision of greater levels of services by us may result in a delay in the timing of revenue recognition. In addition, if we successfully move into other

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markets, such as the consumer market, we will be subject to additional risks associated with that market, including the effects of general market conditions and reduced consumer confidence.

PRODUCT QUALITY PROBLEMS COULD LEAD TO REDUCED REVENUES, GROSS MARGINS AND NET INCOME

We produce highly complex products that incorporate leading-edge technology, including both hardware and software. Software typically contains bugs that can unexpectedly interfere with expected operations. There can be no assurance that our pre-shipment testing programs will be adequate to detect all defects—either in individual products or which could affect numerous shipments—which might interfere with customer satisfaction, reduce sales opportunities, or affect gross margins. In the past, we have had to recall certain components and provide remediation in response to the discovery of bugs in products that we had shipped. While the cost of such recalls and remediation has not been material in the past, there can be no assurance that such a recall or remediation, depending on the product involved, would not have a material impact. An inability to cure a product defect could result in the failure of a product line, temporary or permanent withdrawal from a product or market segment, damage to our reputation, inventory costs, or product reengineering expenses, any of which could have a material impact on revenues, margins and net income.

INDUSTRY CONSOLIDATION MAY LEAD TO INCREASED COMPETITION AND MAY HARM OUR OPERATING RESULTS

There has been a trend toward industry consolidation in our markets for several years. We expect this trend toward industry consolidation to continue as companies attempt to strengthen or hold their market positions in an evolving industry and as companies are acquired or are unable to continue operations. We believe that industry consolidation may result in stronger competitors that are better able to compete as sole-source vendors for customers. This could lead to more variability in operating results and could have a material adverse effect on our business, operating results, and financial condition. Furthermore, particularly in the service provider market, rapid consolidation will lead to fewer customers, with the effect that loss of a major customer could have a material impact on results not anticipated in a customer marketplace composed of more numerous participants.

DUE TO THE GLOBAL NATURE OF OUR OPERATIONS, POLITICAL OR ECONOMIC CHANGES, OR OTHER FACTORS, IN A SPECIFIC COUNTRY OR REGION COULD HARM OUR COSTS, EXPENSES AND FINANCIAL CONDITION

We conduct significant sales and customer support operations in countries outside of the United States and also depend on non-U.S. operations of our contract manufacturers and our distribution partners. For fiscal 2003, we derived 48.9% of our revenues from sales outside the United States. Accordingly, our future results could be materially adversely affected by a variety of uncontrollable and changing factors including, among others, foreign currency exchange rates; political or social unrest or economic instability in a specific country or region; trade protection measures and other regulatory requirements which may affect our ability to import or export our

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products from various countries; political considerations that affect service provider and government spending patterns; difficulties in staffing and managing international operations; and adverse tax consequences, including imposition of withholding or other taxes on payments by subsidiaries. In addition, if the outbreak of Severe Acute Respiratory Syndrome (SARS) in Asia continues or recurs, this could have an adverse impact on our Asian operations. If there is a significant spread of SARS beyond Asia, other aspects of our operations could be negatively impacted. Any or all of these factors could have a material adverse impact on our costs, expenses and financial condition.

WE ARE EXPOSED TO FLUCTUATIONS IN CURRENCY EXCHANGE RATES THAT COULD NEGATIVELY IMPACT OUR FINANCIAL RESULTS AND CASH FLOWS

Because a significant portion of our business is conducted outside the United States, we face exposure to adverse movements in foreign currency exchange rates. These exposures may change over time as business practices evolve and could have a material adverse impact on our financial results and cash flows. Historically, our primary exposures have related to non-dollar-denominated sales in Japan, Canada, and Australia, and certain non-dollar-denominated operating expenses in Europe, Latin America, and Asia, where we sell primarily in U.S. dollars. Additionally, we have exposures to emerging market currencies, which can have extreme currency volatility. An increase in the value of the dollar could increase the real cost to our customers of our products in those markets outside the United States where we sell in dollars, and a weakened dollar could increase the cost of local operating expenses and procurement of raw materials to the extent we must purchase components in foreign currencies.

Currently, we enter into foreign exchange forward contracts to minimize the short-term impact of foreign currency fluctuations on certain foreign currency receivables, investments and payables. In addition, we periodically will hedge anticipated foreign currency cash flows. Our attempts to hedge against these risks may not be successful, resulting in an adverse impact on our net income.

WE ARE EXPOSED TO THE CREDIT RISK OF SOME OF OUR CUSTOMERS AND TO CREDIT EXPOSURES IN WEAKENED MARKETS, WHICH COULD RESULT IN MATERIAL LOSSES

Most of our sales are on an open credit basis, with typical payment terms of 30 days in the United States, and, because of local customs or conditions, longer in some markets outside the United States. We monitor individual customer payment capability in granting such open credit arrangements, seek to limit such open credit to amounts we believe the customers can pay, and maintain reserves we believe are adequate to cover exposure for doubtful accounts. Beyond our open credit arrangements, we have also experienced demands for customer financing and facilitation of leasing arrangements. We expect demand for customer financing to continue. We believe customer financing is a competitive factor in obtaining business, particularly in supplying customers involved in significant infrastructure projects. Our loan financing arrangements may include not only financing the acquisition of our products and services but also providing additional funds for other costs associated with network installation and

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integration of our products and services and for working capital purposes. We do not recognize revenue on such loan financing arrangements until cash payments are received.

Because of the current slowdown in the global economy, our exposure to the credit risks relating to our financing activities described above has increased. Although we have programs in place that are designed to monitor and mitigate the associated risk, including monitoring of particular risks in certain geographic areas, there can be no assurance that such programs will be effective in reducing our credit risks. There have been significant bankruptcies among customers both on open credit and with loan or lease financing arrangements, particularly among Internet businesses and service providers, causing us to incur economic or financial losses. There can be no assurance that additional losses will not be incurred. Although these losses have not been material to date, future losses, if incurred, could harm our business and have a material adverse effect on our operating results and financial condition.

A portion of our sales is derived through our resellers in two-tier distribution channels. These resellers/customers are generally given business terms that allow them to return a portion of inventory, receive credits for changes in selling prices, and participate in various cooperative marketing programs. We maintain estimated accruals and allowances for such exposures. However, such resellers tend to have more limited financial resources than other resellers and end-user customers and therefore represent potential sources of increased credit risk because they may be more likely to lack the reserve resources to meet payment obligations.

OUR PROPRIETARY RIGHTS MAY PROVE DIFFICULT TO ENFORCE

We generally rely on patents, copyrights, trademarks, and trade secret laws to establish and maintain proprietary rights in our technology and products. While we have been issued a number of patents and other patent applications are currently pending, there can be no assurance that any of these patents will not be challenged, invalidated, or circumvented, or that any rights granted under these patents will in fact provide competitive advantages to us. Furthermore, many key aspects of networking technology are governed by industry-wide standards, which are usable by all market entrants. In addition, there can be no assurance that patents will be issued from pending applications, or that claims allowed on any patents will be sufficiently broad to protect our technology. In addition, the laws of some foreign countries may not protect our proprietary rights to the same extent as do the laws of the United States. The outcome of any actions taken in these foreign countries may be different than if such actions were determined under the laws of the United States. While we are not dependent on any individual patents or group of patents for particular segments of the business for which we compete, if we are unable to protect our proprietary rights to the totality of the features (including aspects of products protected other than by patent rights) in a market, we may find ourselves at a competitive disadvantage to others who need not incur the substantial expense, time and effort required to create the innovative products which have enabled us to be successful.

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WE MAY BE FOUND TO INFRINGE ON INTELLECTUAL PROPERTY RIGHTS OF OTHERS

Third parties, including customers, have in the past and may in the future assert claims or initiate litigation related to exclusive patent, copyright, trademark and other intellectual property rights to technologies and related standards that are relevant to us. These assertions have increased over time as a result of our growth and the general increase in the pace of patent claims assertions, particularly in the United States. Because of the existence of a large number of patents in the networking field, the secrecy of some pending patents and the rapid rate of issuance of new patents, it is not economically practical nor even possible to determine in advance whether a product or any of its components infringe or will infringe the patent rights of others. The asserted claims and/or initiated litigation, can include claims against us or our manufacturers, suppliers, or customers, alleging infringement of their proprietary rights with respect to our existing or future products or components of those products. Regardless of the merit of these claims, they can be time-consuming, result in costly litigation and diversion of technical and management personnel, or require us to develop a non-infringing technology or enter into license agreements. Where claims are made by customers, resistance even to unmeritorious claims could damage customer relationships. There can be no assurance that licenses will be available on acceptable terms and conditions, if at all, in all such circumstances, or that our indemnification by their suppliers will be adequate to cover their costs if a claim were brought directly against us or our customers. Furthermore, because of the potential for high court awards which are not necessarily predictable, it is not unusual to find even arguably unmeritorious claims settled for significant funds. If any infringement or other intellectual property claim made against us by any third party is successful, or if we fail to develop non-infringing technology or license the proprietary rights on commercially reasonable terms and conditions, our business, operating results and financial condition could be materially and adversely affected.

Our exposure to risks associated with the use of intellectual property may be increased as a result of acquisitions, as we have a lower level of visibility into the development process with respect to such technology or the care taken to safeguard against infringement risks. Further, in the past third parties have made infringement and similar claims after we have acquired technology that had not been asserted prior to our acquisition.

WE RELY ON THE AVAILABILITY OF THIRD-PARTY LICENSES

Many of our products are designed to include software or other intellectual property licensed from third parties. It may be necessary in the future to seek or renew licenses relating to various aspects of these products. There can be no assurance that the necessary licenses would be available on acceptable terms, if at all. The inability to obtain certain licenses or other rights or to obtain such licenses or rights on favorable terms, or the need to engage in litigation regarding these matters, could have a material adverse effect on our business, operating results, and financial condition. Moreover, the inclusion in our products of software or other intellectual property licensed from third parties on a non-exclusive basis could limit our ability to protect our proprietary rights in our products.

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OUR OPERATING RESULTS AND FUTURE PROSPECTS COULD BE MATERIALLY HARMED BY UNCERTAINTIES OF REGULATION OF THE INTERNET

Currently, few laws or regulations apply directly to access or commerce on the Internet. We could be materially adversely affected by regulation of the Internet and Internet commerce in any country where we operate. Such regulations could include matters such as voice over the Internet or using Internet Protocol, encryption technology, and access charges for Internet service providers. The adoption of regulation of the Internet and Internet commerce could decrease demand for our products, and at the same time, increase the cost of selling our products, which could have a material adverse effect on our business, operating results, and financial condition.

OUR SUCCESS LARGELY DEPENDS ON OUR ABILITY TO RETAIN AND RECRUIT KEY PERSONNEL, AND ANY FAILURE TO DO SO WOULD HARM OUR ABILITY TO MEET KEY OBJECTIVES

Our success has always depended in large part on our ability to attract and retain highly skilled technical, managerial, sales and marketing personnel. In spite of the economic slowdown, competition for these personnel is intense, especially in the Silicon Valley area of Northern California. Volatility or lack of positive performance in our stock price may also adversely affect our ability to retain key employees, all of whom have been granted stock options. The loss of services of any of our key personnel, the inability to retain and attract qualified personnel in the future, or delays in hiring required personnel, particularly engineering and sales personnel, could make it difficult to meet key objectives, such as timely and effective product introductions. In addition, companies in the networking industry whose employees accept positions with competitors frequently claim that competitors have engaged in improper hiring practices. We have received these claims in the past and may receive additional claims to this effect in the future.

ADVERSE RESOLUTION OF LITIGATION MAY HARM OUR OPERATING RESULTS OR FINANCIAL CONDITION

We are a party to lawsuits in the normal course of our business. Litigation can be expensive, lengthy and disruptive to normal business operations. Moreover, the results of complex legal proceedings are difficult to predict. An unfavorable resolution of a particular lawsuit could have a material adverse effect on our business, operating results, or financial condition. For additional information regarding certain of the lawsuits in which we are involved, see Item 3, “Legal Proceedings,” contained in Part I of this report.

CHANGES IN EFFECTIVE TAX RATES OR ADVERSE OUTCOMES RESULTING FROM EXAMINATION OF OUR INCOME TAX RETURNS COULD ADVERSELY AFFECT OUR RESULTS

Our future effective tax rates could be adversely affected by earnings being lower than anticipated in countries where we have lower statutory rates, by changes in the valuation of our

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deferred tax assets and liabilities, or by changes in tax laws or interpretations thereof. In addition, we are subject to the continuous examination of our income tax returns by the Internal Revenue Service and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. There can be no assurance that the outcomes from these continuous examinations will not have an adverse effect on our operating results and financial condition.

OUR BUSINESS AND OPERATIONS ARE ESPECIALLY SUBJECT TO THE RISKS OF EARTHQUAKES, FLOODS, AND OTHER NATURAL CATASTROPHIC EVENTS

Our corporate headquarters, including certain of our research and development operations and our manufacturing facilities, are located in the Silicon Valley area of Northern California, a region known for seismic activity. Additionally, a certain number of our facilities, including one of our manufacturing facilities, are located near rivers that have experienced flooding in the past. A significant natural disaster, such as an earthquake or a flood, could have a material adverse impact on our business, operating results, and financial condition.

MANMADE PROBLEMS SUCH AS COMPUTER VIRUSES OR TERRORISM MAY DISRUPT OUR OPERATIONS AND HARM OUR OPERATING RESULTS

Despite our implementation of network security measures, our servers are vulnerable to computer viruses, break-ins, and similar disruptions from unauthorized tampering with our computer systems. Any such event could have a material adverse effect on our business, operating results and financial condition. In addition, the effects of war or acts of terrorism could have a material adverse effect on our business, operating results and financial condition. The continued threat of terrorism and heightened security and military action in response to this threat, or any future acts of terrorism, may cause further disruptions to these economies and create further uncertainties. Similarly, events such as the recent blackouts in the eastern United States, and recurrences of these blackouts, could have similar negative impacts. To the extent that such disruptions or uncertainties result in delays or cancellations of customer orders, or the manufacture or shipment of our products, our business, operating results and financial condition could be materially and adversely affected.

WE ARE EXPOSED TO FLUCTUATIONS IN THE MARKET VALUES OF OUR PORTFOLIO INVESTMENTS AND IN INTEREST RATES; IMPAIRMENT OF OUR INVESTMENTS COULD HARM OUR EARNINGS

We maintain an investment portfolio of various holdings, types and maturities. These securities are generally classified as available for sale and, consequently, are recorded on the Consolidated Balance Sheets at fair value with unrealized gains or losses reported as a separate component of accumulated other comprehensive income (loss), net of tax. Part of this portfolio includes equity investments in several publicly traded companies, the values of which are subject to market price volatility. The current economic downturn and other factors have adversely affected the public equities market, and general economic conditions may continue to worsen. As a result, we may

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recognize in earnings the decline in fair value of our publicly traded equity investments below the cost basis when the decline is judged to be other- than- temporary. For information regarding the sensitivity of and risks associated with the market value of portfolio investments and interest rates, refer to the section titled “Quantitative and Qualitative Disclosures About Market Risk” in our 2003 Annual Report to Shareholders, which is incorporated by reference in Item 7A of this report. Furthermore, our equity investments in both publicly traded companies and private companies are subject to risk of loss of investment capital. These investments are inherently risky as the market for the technologies or products they have under development are typically in the early stages and may never materialize. We could lose our entire investment in these companies.

IF WE DO NOT SUCCESSFULLY MANAGE OUR STRATEGIC ALLIANCES, WE MAY EXPERIENCE INCREASED COMPETITION OR DELAYS IN PRODUCT DEVELOPMENT

We have several strategic alliances with large and complex organizations and other companies with whom we work to offer complementary products and services. These arrangements are generally limited to specific projects, the goal of which is generally to facilitate product compatibility and adoption of industry standards. If successful, these relationships may be mutually beneficial and result in industry growth. However, these alliances carry an element of risk because, in most cases, we must compete in some business areas with a company with which we have a strategic alliance and, at the same time, cooperate with that company in other business areas. Also, if these companies fail to perform or if these relationships fail to materialize as expected, we could suffer delays in product development or other operational difficulties.

CHANGES IN TELECOMMUNICATIONS REGULATION AND TARIFFS COULD HARM OUR PROSPECTS AND FUTURE SALES

Changes in telecommunications requirements in the United States or other countries could affect the sales of our products. In particular, we believe that there may be future changes in U.S. telecommunications regulations that could slow the expansion of the service providers’ network infrastructures and materially adversely affect our business, operating results, and financial condition. Future changes in tariffs by regulatory agencies or application of tariff requirements to currently untariffed services could affect the sales of our products for certain classes of customers. Additionally, in the United States, our products must comply with various Federal Communications Commission requirements and regulations. In countries outside of the United States, our products must meet various requirements of local telecommunications authorities. Changes in tariffs or failure by us to obtain timely approval of products could have a material adverse effect on our business, operating results, and financial condition.

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OUR STOCK PRICE MAY CONTINUE TO BE VOLATILE

Our common stock has experienced substantial price volatility, particularly as a result of variations between our actual financial results and the published expectations of analysts, and as a result of announcements by our competitors and us. Furthermore, speculation in the press or investment community about our strategic position, financial condition, results of operations, business or significant transactions can cause changes in our stock price. In addition, the stock market has experienced extreme price and volume fluctuations that have affected the market price of many technology companies, in particular, and that have often been unrelated to the operating performance of these companies. These factors, as well as general economic and political conditions, may materially adversely affect the market price of our common stock in the future. Additionally, volatility or a lack of positive performance in our stock price may adversely affect our ability to retain key employees, all of whom are compensated in part based on the performance of our stock price.

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Executive Officers of the Registrant

The following table shows the name, age and position of each of our executive officers as of August 31, 2003:

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Our headquarters is located on an owned site in San Jose, California. In addition to this site, we have certain owned sites in the United States, which include facilities in the surrounding areas of San Jose, California; Boxborough, Massachusetts; Salem, New Hampshire; Richardson, Texas; and Research Triangle Park, North Carolina. We also own land for expansion in some of these locations. In addition, we also lease office space in several U.S. locations.

Outside the United States, we have operations, primarily in leased sites, in the Americas; EMEA; Asia Pacific; and Japan. Larger site locations include the United Kingdom, France, Belgium, the Netherlands, Singapore, Hong Kong, Australia, Japan, and India. We own and lease manufacturing facilities, which are primarily test and assembly operations, in three locations in the United States and none internationally. We believe that our existing properties are in good condition and suitable for the conduct of our business.

For additional information regarding obligations under leases, see Note 8 to the Consolidated Financial Statements in our 2003 Annual Report to Shareholders, which is incorporated by reference herein. For additional information regarding properties by operating segment, see Note 12 to the Consolidated Financial Statements in our 2003 Annual Report to Shareholders, which is incorporated by reference herein.

Beginning on April 20, 2001, a number of purported shareholder class action lawsuits were filed in the United States District Court for the Northern District of California against us and certain of our officers and directors. The lawsuits have been consolidated, and the consolidated action is purportedly brought on behalf of those who purchased our publicly traded securities between August 10, 1999 and February 6, 2001. Plaintiffs allege that defendants have made false and misleading statements, purport to assert claims for violations of the federal securities laws, and seek unspecified compensatory damages and other relief. We believe the claims are without merit and intend to defend the actions vigorously.

In addition, beginning on April 23, 2001, a number of purported shareholder derivative lawsuits were filed in the Superior Court of California, County of Santa Clara and in the Superior Court of California, County of San Mateo. There is a procedure in place for the coordination of such actions. Two purported derivative suits have also been filed in the United States District Court for the Northern District of California, and those federal court actions have been consolidated. The consolidated federal court derivative action was dismissed by the court, and plaintiffs have appealed from that decision. The complaints in the various derivative actions include claims for breach of fiduciary duty, waste of corporate assets, mismanagement, unjust enrichment, and violations of the California Corporations Code; seek compensatory and other damages, disgorgement, and other relief; and are based on essentially the same allegations as the class actions.

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In addition, we are subject to legal proceedings, claims, and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, we do not expect that the ultimate costs to resolve these matters will have a material adverse effect on our consolidated financial position, results of operations, or cash flows.

None.

PART II

On May 7, 2003, we issued an aggregate of 773,717 shares of our common stock in connection with the acquisition of SignalWorks, Inc. On May 31, 2003, we issued an aggregate of 28,961,987 shares of our common stock in connection with the acquisition of the business of The Linksys Group, Inc. The offers and sales of these securities were effected without registration in reliance on the exemption afforded by Section 3(a)(10) of the Securities Act of 1933, as amended. Each issuance was approved, after a hearing upon the fairness of the terms and conditions of the transaction, by the California Department of Corporations under authority to grant such approval as expressly authorized by the laws of the State of California.

The remaining information required by this item is incorporated by reference to page 63 of our 2003 Annual Report to Shareholders.

The information required by this item is incorporated by reference to page 17 of our 2003 Annual Report to Shareholders.

The information required by this item is incorporated by reference to pages 18 to 32 of our 2003 Annual Report to Shareholders.

The information required by this item is incorporated by reference to pages 33 to 34 of our 2003 Annual Report to Shareholders.

The information required by this item is incorporated by reference to pages 35 to 63 of our 2003 Annual Report to Shareholders.

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None.

Evaluation of disclosure controls and procedures. Based on our management’s evaluation (with the participation of our principal executive officer and principal financial officer), as of the end of the period covered by this report, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, (the “Exchange Act”)) are effective to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms.

Changes in internal control over financial reporting. There was no change in our internal control over financial reporting during our fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART III

The information required by this item relating to our directors and nominees, and compliance with Section 16(a) of the Securities Act of 1934 is included under the captions “Proposal No. 1:–Election of Directors” and “Ownership of Securities–Section 16(a) Beneficial Ownership Reporting Compliance” in our Proxy Statement related to the 2003 Annual Meeting of Shareholders and is incorporated herein by reference.

The information required by this item relating to our executive officers is included under the caption “Executive Officers of the Registrant” in Part I of this report and is incorporated by reference into this section.

We have adopted a code of ethics that applies to our principal executive officer and all members of our finance department, including the principal financial officer and principal accounting officer. This code of ethics, which consists of the “Special Ethics Obligations for Employees with Financial Reporting Responsibilities” section of our Code of Business Conduct and Corporate Governance that applies to employees generally, is posted on our Website. The Internet address for our Website is http://www.cisco.com, and the code of ethics may be found as follows:

We intend to satisfy the disclosure requirement under Item 10 of Form 8-K regarding an amendment to, or waiver from, a provision of this code of ethics by posting such information on our website, at the address and location specified above.

The information required by this item is included under the captions “Proposal No. 1:–Election of Directors–Director Compensation” and Executive Compensation and Related Information” in our Proxy Statement related to the 2003 Annual Meeting of Shareholders and is incorporated herein by reference.

The information required by this item relating to security ownership of certain beneficial owners and management, and securities authorized for issuance under equity compensation plans is included under the captions “Ownership of Securities” and “Equity Compensation Plan Information” in our Proxy Statement related to the 2003 Annual Meeting of Shareholders and is incorporated herein by reference.

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The information required by this item is included under the caption “Executive Compensation and Related Information–Certain Relationships and Related Transactions” in our Proxy Statement related to the 2003 Annual Meeting of Shareholders and is incorporated herein by reference.

The information required by this item is included under the captions “Proposal No. 3:–Ratification of Independent Auditors–Principal Accountant Fees and Services” and “–Policy on Audit Committee Pre-Approval of Audit and Permissible Non-Audit Services of Independent Auditors” in our Proxy Statement related to the 2003 Annual Meeting of Shareholders and is incorporated herein by reference.

PART IV

The Index to Financial Statements and Financial Statement Schedule on Page 39 is incorporated herein by reference as the list of financial statements required as part of this report.

The Index to Financial Statements and Financial Statement Schedule on Page 39 is incorporated herein by reference as the list of financial statement schedules required as part of this report.

The exhibit list in the Index to Exhibits on page 44 is incorporated herein by reference as the list of exhibits required as part of this report.

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We filed or furnished three reports on Form 8-K during our fourth quarter ended July 26, 2003. Information regarding the items reported on is as follows:

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INDEX TO FINANCIAL STATEMENTS

AND FINANCIAL STATEMENT SCHEDULE

Item 15(a)

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SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

(In millions)

The allowance for inventory for fiscal 2002 and 2001 has been reclassified in order to conform to the current year presentation of allowance for inventory and liability for purchase commitments. The liability for purchase commitments is reported as other accrued liabilities on the Consolidated Balance Sheets.

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REPORT OF INDEPENDENT AUDITORS ON FINANCIAL STATEMENT SCHEDULE

To the Board of Directors and Shareholders of Cisco Systems, Inc.:

Our audits of the consolidated financial statements referred to in our report dated August 5, 2003, appearing in the 2003 Annual Report to Shareholders of Cisco Systems, Inc. (which report and consolidated financial statements are incorporated by reference in this Annual Report on Form 10-K) also included an audit of the financial statement schedule listed in Item 15(a) (2) of this Form 10-K. In our opinion, this financial statement schedule presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements.

August 5, 2003

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this Report on Form 10-K to be signed on its behalf by the undersigned, thereunto duly authorized.

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints John T. Chambers and Dennis D. Powell, jointly and severally, his attorney in fact, each with the full power of substitution, for such person, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he might do or could do in person hereby ratifying and confirming all that each of said attorneys-in-fact and agents, or his substitute, may do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report on Form 10-K has been signed below by the following persons on behalf of the registrant in the capacities and on the dates indicated.

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Index to Exhibits

44