In addition, Terremark uses technology from NetWitness Corp. to do network packet inspection.

But if you build a virtual network , you can populate it with real network packets.

With Nicira's platform, the hardware merely moves network packets to and fro, and the software does the thinking.

For example, some ISPs use a standard called BCP38 to reduce spoofing, the process used by attackers to transmit network packets with fake sender addresses.