June 28, 2010

VIA EDGAR, OVERNIGHT COURIER AND FACSIMILE
Securities and Exchange Commission
Division of Corporation Finance
100 F Street, N.E.
Washington, DC 20549
Fax. No. (703) 813-6981

Attention:   Tamara Tangen, Staff Accountant
Division of Corporation Finance

Re: Comment Letter Dated June 24, 2010
Juniper Networks, Inc.
Form 10-K for the year ended December 31, 2009
Filed February 26, 2010
File No. 001-34501

Ladies and Gentlemen:

     We refer to Mr. Krikorian’s letter dated June 24, 2010 which sets forth the comments of the staff of the Securities and Exchange Commission (the “Staff”) regarding the Form 10-K for the year ended December 31, 2009 of Juniper Networks, Inc. (the “Company”).

     The Company intends to respond to the Staff’s comments on or before July 23, 2010.

     If you have any questions, please do not hesitate to call the undersigned at (408) 745-2384.

Very truly yours,

JUNIPER NETWORKS, INC.
 

/s/ Mitchell L. Gaynor  

Senior Vice President and General Counsel