Network Policy and Access Services
Network Policy and Access Services (NPAS) allows you to provide local and remote network access and to define and enforce policies for network access authentication, authorization, and client health. The NPAS server role includes Network Policy Server (NPS), the Routing and Remote Access service (RRAS), Health Registration Authority (HRA), and Host Credentials Authorization Protocol (HCAP).
Network Policy and Access Services in the Windows Server 2008 Technical Library
Deployment—Routing and Remote Access
Deployment—Network Access Protection
Deployment—Network Policy Server