Cisco Systems agreed to acquire Riverhead Networks, a start-up based in Cupertino, California for its security technology that protects against Distributed Denial of Service ("DDoS") attacks and other security threats in enterprise and service provider networks. Under the terms of the agreement, Cisco will pay approximately $39 million in cash for all outstanding shares not already held by Cisco and will convert outstanding Riverhead options to Cisco options. Riverhead's technology compares traffic flows to learned profiles of normal traffic...
