Network Access Protection (NAP) is a Microsoft technology for controlling network access of a computer host based on system health of the host, first introduced in Windows Server 2008.
With Network Access Protection, system administrators of an organization's computer network can define policies for system health requirements. Examples of system health requirements are whether the computer has the most recent operating system updates installed, whether the computer has the latest version of the anti-virus software signature, or whether the computer has a host-based firewall installed and enabled. Connecting or communicating computers have their health status evaluated. Computers that comply with system health requirements have full access to the network. Administrators can configure health policies that make it possible to ensure that computers not in compliance with system health requirements have restricted access to the network.
Read more about Network Access Protection: Overview, NAP Client Support
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