Explanation/Reference:
Explanation:
Network Access Protection
Network Access Protection (NAP) is a feature in Windows Server 2008 that controls access to network resources based on a client computer's identity and compliance with corporate governance policy. NAP allows network administrators to define granular levels of network access based on who a client is, the groups to which the client belongs, and the degree to which that client is compliant with corporate governance policy. If a client is not compliant, NAP provides a mechanism to automatically bring the client back into compliance and then dynamically increase its level of network access. NAP Client Configuration Network Access Protection (NAP), a new feature in Windows Vista®and Windows Server® 2008, allows you to control the access of client computers to network resources based on computer identity and compliance with corporate governance policy. To implement NAP, you must configure NAP settings on both servers and client computers. There are three tools that you can use to configure NAP client settings:
The NAP Client Configuration console provides a graphical user interface with which you can configure NAP client settings on the local computer or in a configuration file that you can save and apply to other computers. The Netsh commands for NAP client provide a command-line tool that you can use to configure client computers or to create a configuration file that you can save and apply to other computers.
If you want to manage NAP client settings on domain member client computers, you can use the Group Policy Management Console and the Group Policy Management Editor. When you configure NAP client settings in Group Policy, these settings are applied on NAP-capable domain member client computers when Group Policy is refreshed. To enable and disable the DHCP enforcement client by using the Windows interface
To open the NAP Client Configuration console, click Start, click All Programs, click Accessories, click

Run, type NAPCLCFG.MSC, and then click OK.
Click Enforcement Clients.

Right-click DHCP Enforcement Client, and then click Enable or Disable.

Network Access Protection Agent
The Network Access Protection (NAP) agent service collects and manages health information for client computers on a network. Information collected by NAP agent is used to make sure that the client computer has the required software and settings. If a client computer is not compliant with health policy, it can be provided with restricted network access until its configuration is updated. Depending on the configuration of health policy, client computers might be automatically updated so that users quickly regain full network access without having to manually update their computer.