Exhibit 21.1

Subsidiaries of the Registrant

	State or Other Jurisdiction of
Name of Subsidiary *	Incorporation or Organization
Net Optics, Inc.	California
Anue Systems, Inc.	Delaware
BreakingPoint Systems, Inc.	Delaware
Catapult Communications Corporation	Nevada
Catapult Communications Corporation Subsidiaries:
Ixia Technologies International Limited	Ireland
Ixia Communications Kabushiki Kaisha	Japan
Ixia Technologies International Limited Subsidiaries:
Ixia Australia Pty. Ltd.	Australia
Ixia Communications Canada Limited	Canada
Ixia Technologies Europe Limited	United Kingdom
Ixia Hong Kong Limited	China
Ixia Technologies (Shanghai) Company Limited	China
Ixia Korea, Ltd.	Korea
IxiaCom Technologies Sdn. Bhd.	Malaysia
Ixia Israel Ltd.	Israel
Ixia Technologies Private Limited	India
Ixia Pte. Ltd.	Singapore
S.C. Ixia SRL	Romania
VeriWave, Inc.	Delaware

* The subsidiaries of the Registrant do not do business under any name other than as listed above.