The Windows Server 2008 Technical Library is a great resource for finding information about performing common tasks and operations for Windows technologies. The content in the networking section of this library offers some great information on many areas, like DHCP, Network Access Protection (NAP), Network Policy Server (NPS), Netsh, RRAS, SNMP, Windows Firewall with Advanced Security (WFAS), and more..
Looking for information about Windows Firewall with Advanced Security and IPsec? The guide provides documentation regarding product evaluations, getting started, planning architecture, deployment, operations and troubleshooting.
How about NAP Step-by-Step Guides for IPsec, 802.1X, VPN or DHCP NAP Enforcement?
Some sections currently have placeholders that indicate "This document is not yet available." Keep checking back as these sections will be updated when the content is available.
Similar content for Windows 2003 is also available in the Windows Server 2003: Operations guide.