Arbor Networks Names Former ActivCard President Thomas Arthur Chief Executive Officer.

Business/Technology Editors

LEXINGTON, Mass.--(BUSINESS WIRE)--Aug. 5, 2002

Proven security and networking veteran to lead growing

network availability company

Arbor Networks(TM), a leading provider of network availability solutions, today announced the appointment of Thomas Arthur as the company's chief executive officer. Most recently, Arthur served as the president of ActivCard, Inc., a leader in digital identity and electronic certification technology. Arthur brings a wealth of security and networking expertise, having built ActivCard's U.S. presence and played a key role in the company's increases in market share, five-fold revenue growth and highly successful IPO.

Underscoring the company's momentum in the network availability market, Arbor also today announced the closing of its second round of funding (see Arbor Networks Secures $22 Million in an Oversubscribed Series B Funding Round; Total Investment Grows to $33 Million, August 5).

"From its earliest days, Arbor has built credibility with an innovative approach, a proven technology platform and a focused, top-tier, customer base," said Dr. Farnam Jahanian, co-founder of Arbor Networks. "It is this model that attracted an executive of Tom's caliber to the company. With Tom on board, Arbor is now poised to accelerate the business to

the next level. He has a proven track record of rapidly growing revenue and market share for new networking and security businesses. His skills in developing strong teams and establishing strategic marketing partnerships will be vital to Arbor's growth plans."

Arbor Networks builds availability solutions for companies that run large, complex, mission-critical networks. Network anomalies that threaten availability - such as denial of service (DoS) attacks, network worms and routing attacks - can significantly impact revenue, reputation, relationships and critical communications. For example, the Yankee Group estimates that the impact of the February 2000 DoS attacks was $1.2 billion. Arbor Networks' Peakflow(TM) solutions close the gap between the detection of such anomalies and their resolution, protecting the availability of critical networks.

Arthur was recruited by Paris-based ActivCard to build the company's U.S. operations across sales, marketing and business development. He architected a business plan that refocused the company on developing smart card-based digital identity solutions for network computing. Arthur's leadership was instrumental in enabling ActivCard to secure major North American accounts, including the U.S. Department of Defense, Hewlett-Packard, Sun Microsystems and Citicorp. Arthur's efforts also greatly contributed to the company's move from a position of fifth to second in authentication market share and grew revenue from $6 million to $35 million. Arthur also played a key role in raising capital for ActivCard, most recently leading a highly successful initial public offering.

[pilcrow (paragraph sign)] Prior to joining ActivCard, Arthur was the general manager of the Internet Infrastructure Division of Novell, leading the engineering, business development and marketing teams responsible for directory and security services. Under Arthur's leadership, the division established major licensing deals with AT&T, Deutche Telecom, NTT, Hewlett-Packard, Sun Microsystems and IBM. These relationships created a platform for Novell and its partners to drive revenue from cross platform, value-added networking services. In his twelve years with Novell, Arthur held positions of increasing responsibility across sales, business development and marketing.

"Joining Arbor is an opportunity to build on a strong foundation," said Arthur. "With roots in Cisco and DARPA-funded research at the University of Michigan, Arbor has pioneered the use of network anomaly detection. The Arbor team is solving real problems for enterprises, service providers and government agencies that rely on their networks for critical communications and transactions. In a relatively short period of time, Arbor has built an enviable team of customers, partners and employees that are solving some of the network's most vexing challenges."

About Arbor Networks

Arbor Networks(TM) builds availability solutions for companies whose success depends on highly available and fully optimized networks. Arbor Networks' Peakflow(TM) is a distributed, non-intrusive, scalable availability solution that detects network anomalies such as denial of service attacks, worm propagation and next-generation infrastructure attacks, and enables network operators to rapidly resolve these threats to ensure the highest level of network availability and performance. Arbor Networks' patent-pending technology is based on three years of pioneering research in the availability, reliability and security of networks and distributed systems, conducted at the University of Michigan by Arbor Networks founders. Funded by Thomas Weisel Venture Partners, Battery Ventures, Cisco Systems, Comcast Interactive Capital, SAIC Venture Capital Corporation, Ironside Ventures and EDF Ventures, Arbor has been recognized as one of UPSIDE Magazine's Hot 100 Private Companies in 2002, Red Herring's Ten to Watch in 2001 and Network World's Ten Start-Ups to Watch in 2001.

Copyright (c) 2001-2002 Arbor Networks, Inc. All rights reserved. Arbor Networks, the Arbor Networks logo, Peakflow and the Peakflow logo, and ArbOS are trademarks of Arbor Networks, Inc. in the USA and other countries. All other trademarks are the property of their respective owners.