F5 Solves the Problem of Slow Web Applications with New Release of WebAccelerator(TM) Product.

SEATTLE -- F5 Networks, Inc. (NASDAQ:FFIV):

--WebAccelerator Now Available on F5's Powerful TMOS Architecture

--Offers the Only Solution That Has Been Tested and Validated at Major Software Vendors Including Microsoft, Siebel, BEA 

F5 Networks, Inc. (NASDAQ:FFIV), the global leader in Application Delivery Networking, today announced a new release of its WebAccelerator(TM) product for enterprise organizations that need superior web application acceleration. The WebAccelerator product is now available on F5's advanced TMOS architecture, delivered as an add-on module for the BIG-IP(R) 6400, 6800, and 8400 platforms. Through this integration on TMOS, WebAccelerator inherits powerful features such as iRules, QoS, Packet Filtering, and TCP Express. In addition, F5 is announcing a high-performance, next-generation WebAccelerator 4500 platform that has been engineered to provide industry leading scale, high availability, and manageability; ensuring superior reliability, platform longevity, and lower TCO.

"F5's WebAccelerator has significantly increased the performance and response times of our IBM WebSphere applications, providing our customers an enhanced online retail experience," said Harry Roberts, Senior Vice President and CIO at Boscov's Department Stores, LLC. "Its flexible, intelligent, and reliable application acceleration capabilities have lowered TCO and enabled us to meet our strict budget requirements."

The WebAccelerator product offers the industry's most advanced web application acceleration through F5's unique Validated Web Application acceleration policies and Intelligent Browser Referencing technologies. Validated Web Application acceleration policies offer specialized configuration options that have been certified, tested, and proven to work effectively with web application platforms from Microsoft, Siebel, Oracle, and Plumtree/BEA Aqualogic. Additionally, the policies can act as built-in templates to enable enterprises to quickly customize WebAccelerator for their specific web applications. WebAccelerator's Intelligent Browser Referencing capability enables organizations to overcome issues that hamper web application performance, including WAN latency and bad browser-side behavior. Unlike other solutions, WebAccelerator's Intelligent Browser Referencing provides a completely clientless approach and improves application performance by 3 to 10 times.

"The web application acceleration space has generated a great deal of excitement lately, but it is still a relatively new market with lots of room for innovation," said Zeus Karravala, Vice President at the Yankee Group. "With its new release of WebAccelerator, F5 has taken some innovative steps in this market by offering unique capabilities that will help accelerate some of the more popular web applications. Enterprises can benefit from F5's application specificity, comprehensive Application Delivery Networking portfolio, and unique TMOS architecture."

F5's new WebAccelerator 4500 platform features a revolutionary hardware design with a fully redundant architecture and industry-leading scalability to help enterprises prepare for future application growth. The 4500 platform comes with a base configuration comprised of dual, redundant, hot swappable power supplies and hot swappable 150GB hard drives with RAID to ensure continuous operation in case of component failure. In addition, compliance with EU regulations for the Reduction of Hazardous Substances (RoHS) ensures that F5 can deliver a more environmentally friendly platform for Europe and the world.

"With WebAccelerator, F5 is the first vendor to deliver such extensive application specificity and offers 'packaged intelligence' for the application being deployed," said Jason Needham, Director of Product Management at F5. "This capability enables our customers to improve their application acceleration results, handle application anomalies out-of-the box, and reduce the cost of deployment."

Availability

The WebAccelerator module will run on the BIG-IP 6400, 6800, and 8400 platforms. The WebAccelerator module and the 4500 hardware platform will be available in the third quarter of calendar year 2006.

About F5 Networks

F5 Networks is the global leader in Application Delivery Networking. F5 provides solutions that make applications secure, fast and available for everyone, helping organizations get the most out of their investment. By adding intelligence and manageability into the network to offload applications, F5 optimizes applications and allows them to work faster and consume fewer resources. F5's extensible architecture intelligently integrates application optimization, protection for the application and the network, and delivers application reliability -- all on one universal platform. Over 10,000 organizations and service providers worldwide trust F5 to keep their applications running. The company is headquartered in Seattle, Washington, with offices worldwide. For more information go to www.f5.com.

This press release may contain forward-looking statements relating to future events or future financial performance that involve risks and uncertainties. Such statements can be identified by terminology such as "may," "will," "should," "expects," "plans," "anticipates," "believes," "estimates," "predicts," "potential" or "continue" or the negative of such terms or comparable terms. These statements are only predictions and actual results could differ materially from those anticipated in these statements based upon a number of factors including those identified in the Company's filings with the SEC.