Windows Vista, Windows XP SP3, and Windows Server 2008 include NAP support for the following types of network access or communication:
IEEE 802.1X–authenticated network connections
Remote access VPN connections
DHCP address configurations
Connections to a TS Gateway Server
Administrators can use these types of network access or communication, known as NAP enforcement methods, separately or together to limit the access or communication of noncompliant computers. NPS acts as a health policy server for all these NAP enforcement methods.
The following sections describe the IPsec, 802.1X, VPN, and DHCP enforcement methods.
With IPsec enforcement, a computer must be compliant to initiate communications ...