NETWORLD+INTEROP, LAS VEGAS, May 11, 2004 – Atheros Communications, Inc. (Nasdaq: ATHR), a leading developer of advanced wireless LAN (WLAN) chipsets, today announced that Trapeze Networks™, the award-winning provider of the wireless LAN (WLAN) Mobility System™, is using Atheros’ high-performance 802.11a/b/g technology in its latest enterprise-class Mobility Points. The Mobility Point 262 and Mobility Point 52 were introduced on May 10, 2004. Trapeze will be displaying its line of Mobility Points™ in the Atheros NetWorld+Interop booth, #2801, from May 11-13.

The Mobility Points are part of Trapeze’s WLAN Mobility System that helps enterprises build and manage a secure, service-rich, and operationally efficient WLAN. Trapeze provides the complete set of tools needed to plan, deploy and manage a distributed or centralized WLAN and makes system capabilities, rather than topology, the focal point for customers selecting a WLAN architecture.

“Atheros’ technology delivers the proven high performance needed by enterprises to support and deploy wireless networks,” said Colin Macnab, vice president of marketing and business development of Atheros Communications. “Trapeze understands the various needs of enterprises, including robust performance and flexibility, and has turned to Atheros once again to help deliver innovative products that meet their customers’ specific needs.”

"As part of our efforts to continually provide our enterprise customers with the utmost flexibility, all of our Mobility Points offer dual-band 802.11a/b/g technology to support the widest range of devices that will be brought onto the wireless network,” said Dan Simone, co-founder and vice president of product management and marketing. “We have had a great track record with Atheros’ technology and look forward to continuing our work with them to deliver high performance solutions to our customers.”

About Trapeze Networks

Trapeze Networks delivers the power of business applications and services to the mobile enterprise workforce. The company's wireless LAN Mobility System enhances productivity, introduces new efficiencies, and accelerates business response time by delivering secure mobility for roaming users, sophisticated services for both users and IT, all while offering the lowest total cost of ownership of any WLAN infrastructure provider. Trapeze has been the recipient of seven industry awards in recognition of its product and technology strength. Founded in March 2002, Trapeze has raised $50 million in venture funding to date and is headquartered in Pleasanton, Calif., U.S.A. For more information, please visit www.trapezenetworks.com.

About Atheros Communications, Inc.

Atheros Communications is a leading developer of semiconductor system solutions for wireless communications products. Atheros combines its wireless systems expertise with high-performance radio frequency (RF), mixed signal and digital semiconductor design skills to provide highly integrated chipsets that are manufacturable on low-cost, standard complementary metal-oxide semiconductor (CMOS) processes. Atheros technology is being used by a broad base of leading customers, including personal computer and networking equipment manufacturers. For more information, visit www.atheros.com or send email to info@atheros.com.

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Atheros and the Atheros logo are trademarks of Atheros Communications, Inc.  All other trademarks mentioned in this document are the property of their respective owners.

FORWARD-LOOKING STATEMENTS:

Except for the historical information contained herein, the matters set forth in this press release, including the features, performance and benefits of Atheros’ and Trapeze’s products and technologies, and the future relationship of Atheros and Trapeze, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially, including, but not limited to, the impact of competitive products and technological advances, manufacturing difficulties, difficulties in development of enhanced and new products, the companies’ ability to market and ship in volume, the companies’ ability to continue to work together, and other risks detailed in Atheros’ Prospectus dated February 11, 2004 as filed with the SEC and from time to time in Atheros’ SEC filings. These forward-looking statements speak only as of the date hereof. Atheros disclaims any obligation to update these forward-looking statements.