THE CABLE GUY: Network Policy Server
Nothing’s more critical to the health of your enterprise than a secure network, and Network Policy Server (NPS), new in Windows Server 2008, is an important tool for managing access. It lets you implement organization-wide policies, providing centralized authentication, authorization, and accounting for a variety of network access devices. Joseph Davies discusses the new features of NPS, in particular how Network Access Protection (NAP) helps enforce health requirements for your network.
https://www.microsoft.com/technet/technetmag/issues/2007/12/CableGuy/default.aspx
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