Microsoft Network Access Protection

Network Access Protection (NAP) is a policy enforcement platform built into the Microsoft Windows operating system that allows IT professionals to set policy (for example, operating system and antivirus update policy), which restricts clients from accessing a network until the clients can prove policy compliance. The initial release of NAP will be delivered in Windows Server 2003 Release 2 (R2). For more information about Windows Server 2003 R2, see the Windows Server Product Roadmap