Riverbed Receives Network World's Prestigious "Clear Choice" Award for WAN Acceleration

Business Wire, August 22, 2007

SAN FRANCISCO -- Riverbed Technology, Inc. (Nasdaq:RVBD):

WHAT:           Riverbed receives "Clear Choice" designation from
                Network World.

WHEN & WHERE:   Riverbed's Steelhead Appliance featured in August 13,
                2007 issue of Network World and on Network World
                Online, at
                http://www.networkworld.com/reviews/2007/081307-test-
                wan.html?ts0hb=&story=ab5_wantest.

Riverbed Technology, Inc. (Nasdaq:RVBD), the performance leader in wide-area data services (WDS), announced today that it has won Network World's "Clear Choice" award in a head-to-head test of WAN acceleration devices that speed traffic, cut bandwidth and save organizations money.

Network World has given Riverbed's Steelhead[R] appliances an overall score of 4.65 out of 5 in its comprehensive Clear Choice test of four WAN acceleration devices (Network World, August 13, 2007). Riverbed outperformed WAN acceleration appliances from Cisco, Silver Peak and Blue Coat to achieve the Clear Choice designation.

David Newman, president of Network Test (an independent test lab in Westlake Village, CA), conducted the review for Network World. In his introduction article entitled "WAN acceleration offers huge payoff," Riverbed's Steelhead appliances topped these tests, reducing bandwidth by a factor of 84 in the warm run and a factor of 32 in the 10% run. According to Newman, "Any device that reduces bandwidth use by 20 or 30 times must be considered a boon to IT budgets."

Boxes from each vendor were tested in a "true enterprise context, with a massive test bed pushing data over multiple T-3 and T-1 links," said Newman. "After pounding the systems with the most popular enterprise applications, we're inclined to believe the hype."

Newman also stated that, "As in the CIFS and MAPI tests, the Riverbed[R] Steelhead appliances delivered Web traffic the fastest. In all three ways we measured -- transactions per second, traffic rates and response time -- the Steelhead appliances delivered Web traffic seven times faster than tests with no device inline."

The test also found that only Riverbed's Steelhead appliances sped up file transfers 45 times to a low-bandwidth, low-delay site and 34 times to a low-bandwidth, high-delay site.

About Network World's "Clear Choice" designation

The Network World Clear Choice honor is bestowed upon the highest scoring product in a comparative test when that product scores a 3.7 or higher out of a possible 5 points. Additionally, a product featured in a single-product test is given a Clear Choice designation if it achieves a minimum of a 4.5 score as determined by Network World's testers.

Network World is the premier source of objective, authoritative testing-based articles in the network marketplace. Network World produces articles featuring both single-product and comparative product tests on a weekly basis. The publication partners with its 14-member Network World Lab Alliance, a group of the most qualified industry experts, network integrators and universities, to set methodology, conduct testing and produce the articles.

Test results are published each week in Network World, and on Network World Online at http://www.networkworld.com/reviews/

About Network World, Inc.

Network World, Inc., the Leader in Network Knowledge, empowers Network IT Executives through education, information and community. Network World, an IDG company, is the leading provider of news, analysis, events and education on information technology. Network World publishes the leading newsweekly, Network World, hosts the most active online communities, (www.networkworld.com, www.javaworld.com, www.linuxworld.com and www.demo.com), and produces educational seminars and events worldwide. Network World's portfolio of strategic marketing programs provides marketing and agency professionals with the tools to generate high-quality leads, optimize marketing campaigns, and create new revenue opportunities. Additionally, Network World is the event organizer of DEMO and DEMO fall, the leading events for new technology innovation.

Network World and Network World Online are trademarks of International Data Group (IDG).

About Riverbed's Steelhead Appliances

Riverbed's WDS solutions enable organizations with more than one office to overcome a host of severe problems, including poor application performance and insufficient bandwidth at remote sites. By speeding the performance of applications between distributed sites by five to 50 times and in some cases up to 100 times between enterprise datacenters and remote offices, Riverbed's award-winning Steelhead WDS appliances enable companies to consolidate IT, improve backup and replication processes to ensure data integrity, and improve staff productivity and collaboration. Steelhead appliances have been deployed in organizations ranging from the world's largest corporations with offices around the globe to small companies with a couple of sites that are just miles apart. To learn more, view Riverbed's demo: www.riverbed.com/pr/jack.>