Network Appliance Completes Acquisition of Topio

Sunnyvale, Calif. - December 8, 2006 -- Network Appliance, Inc. (NASDAQ:NTAP) today announced that it has completed the acquisition of Topio, a privately held Santa Clara, California-based company with R&D in Haifa, Israel. Under the terms of the definitive agreement announced November 8, 2006, Network Appliance acquired Topio for approximately $160 million in an all-cash transaction.

Topio is highly regarded for its innovative software that helps customers replicate, recover, and protect data over any distance regardless of the underlying server or storage infrastructure. In addition to delivering a broader range of data protection, data migration, and data cloning capabilities, this acquisition expands the NetApp heterogeneous data-protection portfolio by simplifying the replication of data from other storage arrays to NetApp storage systems.

Topio will be a new Data Replication business unit within NetApp and its research and development team will continue to operate in Haifa, Israel.

Additional details on the NetApp acquisition of Topio can be found in the November 8 initial acquisition press release, available online at http://www.netapp.com/news/press/news_rel_20061108.

About Network Appliance
Network Appliance is a world leader in unified storage solutions for today's data-intensive enterprise. Since its inception in 1992, Network Appliance has delivered technology, product, and partner firsts that simplify data management. Information about Network Appliance™ solutions and services is available at www.netapp.com.

"Safe Harbor" Statement under U.S. Private Securities Litigation Reform Act of 1995
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements include the anticipated benefits to be obtained from the Company's acquisition of Topio and anticipated customer, market, and industry acceptance. These forward-looking statements involve risks and uncertainties, and actual results could vary. Factors that could impact our ability to achieve our goals include our ability to successfully integrate Topio's operations and products with the future success of both companies' product lines; general economic and industry conditions, including expenditure trends for storage-related products; our ability to deliver new product architectures and products that meet market acceptance; our ability to design products that compete effectively from a price and performance perspective; and other important factors as described in Network Appliance, Inc. reports and documents filed from time to time with the Securities and Exchange Commission, including our most recently submitted 10-K and 10-Q.

Press Contact:
Jodi Baumann
Network Appliance, Inc.
(408) 822-3974
jodi@netapp.com

PR Hotline:
408-822-3287
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Investor Contact:
Tara Dhillon
Network Appliance, Inc.
(408) 822-6909
tara@netapp.com