A Network Access Protection (NAP) health policy server is a computer running Windows Server 2008 or Windows Server 2008 R2 with the Network Policy Server (NPS) role service installed and configured to evaluate the health of NAP client computers. All NAP enforcement technologies require at least one health policy server. A NAP health policy server uses policies and settings to evaluate network access requests that are submitted by NAP client computers. These policies and settings are defined in the following sections: