Attached files

file filename
EXCEL - IDEA: XBRL DOCUMENT - F5 NETWORKS INCFinancial_Report.xls
10-Q - FORM 10-Q - F5 NETWORKS INCv59077e10vq.htm
EX-31.1 - EX-31.1 - F5 NETWORKS INCv59077exv31w1.htm
EX-31.2 - EX-31.2 - F5 NETWORKS INCv59077exv31w2.htm
         
Exhibit 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
     In connection with the Quarterly Report of F5 Networks, Inc. (the “Company”) on Form 10-Q for the period ended March 31, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, John McAdam, President and Chief Executive Officer and John Rodriguez, Senior Vice President and Chief Accounting Officer (principal financial officer) of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
     (1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
     (2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.
         
Date: May 6, 2011   
 
/s/ JOHN MCADAM    
John McAdam   
Chief Executive Officer and President   
   
/s/ JOHN RODRIGUEZ    
John Rodriguez   
Senior Vice President and Chief Accounting Officer
(principal financial officer) 
 
 
     A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to F5 Networks, Inc., and will be retained by F5 Networks, Inc., and furnished to the Securities and Exchange Commission or its staff upon request.

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