• Windows 7 is protected on networks by an enhanced firewall and Network Access Pro- tection (NAP). The enhanced firewall can control both inbound and outbound network packets.
• Controlling inbound packets prevents other computers from accessing services. Controlling outbound network packets ensures that if malicious software is installed on Windows 7, then the software cannot access the network and relay any information it might have stolen.
• NAP prevents unhealthy computers from accessing the network. An unhealthy computer is one that has outdated antivirus signatures or is missing security updates. In most cases, unhealthy computers are mobile computers such as laptops used by salespeople.

For more information about Network Access Protection, visit:
http://technet.microsoft.com/en-us/network/bb545879.aspx.