McAffee Intrushield is a IPS. Intrusion protection system. The Intrushield can scan data at up to 10Gbps. Their are different models. I was told by a security enginerr by McAffee security engineer that it is effective because it uses FPGA's and ASIC's to transfer data. I noticied a bullet point that stated that the device could even scan for encrypted threats. I asked how can the IPS device determine if it is legit traffic or Malware? He stated that the device decrypts the packets and then scans the contents.
This device also supports QOS. Which will allow you to prioritize data. For instance VoiP would need more bandwith than P2p. They also have a technology called Vitual IPS to protect VLAN's.
The Intrushield is compatabile with McAffe Orchestra and and Mcaffee NAC.