3Com Appoints Two New Corporate Officers; Marc Willebeek-LeMair and James Hamilton Promoted to New Leadership Positions; Hamilton Named President of TippingPoint, a Division of 3Com.

MARLBOROUGH, Mass. -- 3Com Corporation today announced the promotions of James Hamilton and Marc Willebeek-LeMair to Corporate Officers, effective immediately. The company also announced that Hamilton, the former president and chief operating officer of TippingPoint and current head of world wide sales and service for the security division of 3Com, has been named President of TippingPoint, a division of 3Com. He will report directly to 3Com President and Chief Executive Officer, Bruce Claflin. Hamilton replaces Kip McClanahan who is leaving the company.

"Marc and James have both proven to be tremendous assets to the company, providing the leadership necessary to help with the successful integration of TippingPoint and to guide the company's overall strategy," said Claflin. "Their promotions reflect the confidence we have in them and are well-deserved recognition for the great value and contributions they continue to make to the success of our company."

Prior to joining TippingPoint in 2003, Hamilton was President and CEO of Efficient Networks, Inc., a subsidiary of Siemens AG. Prior to Efficient Networks' acquisition by Siemens in April 2001, he served as Executive Vice President of Worldwide Sales and Marketing as well as General Manager of the company's four products divisions. Throughout his career he has held a number of senior sales and product management positions for companies such as Picazo Communications, Inc., an IP telephony company sold to Intel Corporation in late 1999 and Compaq Computer Corporation.

Willebeek-LeMair was named Chief Technology Officer of 3Com in May 2005 and continues to drive the overall technical strategy for the company. Willebeek-LeMair was an original member of the TippingPoint team and has extensive background in network systems and security. Prior to TippingPoint, he spent 10 years at the T.J. Watson Research Center of IBM where he was responsible for the exploration of High Bandwidth Systems, Intelligent Infrastructure Technologies, as well as streaming audio and video applications. His background also includes research in parallel and distributed computing, multi-media conferencing and management systems.

He earned his doctorate in electrical engineering from Cornell University, has been granted more than 10 patents, and has had more than 50 articles published.

About 3Com Corporation

3Com Corporation (NASDAQ: COMS) is a leading provider of secure, converged voice and data networking solutions for enterprises of all sizes. 3Com offers a broad line of innovative products backed by world class sales, service and support, which excel at delivering business value for its customers. Through its TippingPoint division, 3Com is the leading provider of network-based intrusion prevention systems that deliver in-depth application protection, infrastructure protection, and performance protection for corporate enterprises, government agencies, service providers and academic institutions. For further information, please visit www.3com.com, or the press site www.3com.com/pressbox.

Copyright (C) 2005 3Com Corporation. 3Com and the 3Com logo are registered trademarks and TippingPoint is a trademark of 3Com Corporation or its subsidiaries.