This document summarizes Network Access Protection (NAP) in Windows Server 2008. It discusses how NAP enhances security by authenticating, authorizing, and validating the health of systems connecting to the network. It provides an overview of the NAP architecture and how NAP works with DHCP, VPN/IPsec, and 802.1x to control network access based on system health policies. The document also demonstrates NAP configurations for DHCP and VPN/RRAS enforcement of health policies.