NEW YORK--(BUSINESS WIRE)--ONUG Spring 2015 -- Silver Peak, the leader in building hybrid and Internet WANs, today announced the successful completion of the Open Networking User Group’s (ONUG) first testing program, which validates software-defined WAN (SD-WAN) market solutions against key IT requirements. The ONUG use case validation testing is a landmark event in the networking industry, signaling the first time commercial solutions are being tested against requirements outlined by the ONUG