Microsoft Knowledge Base Article 921070 contains the following session summary:

This Support WebCast summarizes the content in the “Introduction to Network Access Protection” white paper that can be downloaded at http://www.microsoft.com/technet/itsolutions/network/nap/napoverview.mspx. The WebCast provides an overview of the Network Access Protection platform in Microsoft Windows Server "Longhorn" and Microsoft Windows Vista, the components of Network Access Protection, and how Network Access Protection works for various enforcement methods.

This is a Level 200 session that was recorded June 02, 2006 and presented by Joseph Davies. Joseph Davies is a technical writer in the Windows Networking and Device Technologies group at Microsoft. He has been a technical writer and instructor of TCP/IP and networking technology topics since 1992 and has written product documentation, Web content, training courseware, and five books for Microsoft Press that include the award winning title Understanding IPv6 (http://www.microsoft.com/MSPress/books/4883.asp).