Bored with Windows networking? Haven't seen anything new in, like, forever? Well just wait until you see what Windows Vista packs! It's networking components are all-new from the ground up. The TCP/IP stack has been rebuilt for performance and security, with routing compartments that prevent unwanted forwarding of traffic between the Internet and a VPN (for example), support for the strong end-system model, a completely re-designed filtering engine, improved automatic performance fine-tuning, increased resiliency against TCP/IP-based denial-of-service attacks, and full IPv6 support. The firewall includes all Windows XP Service Pack 2 (SP2) functionality plus bi-directional policy control, enforcement of service hardening communications, an automatic no-exceptions mode for un-patched systems, additional management capabilities, and many new audit events. IPsec's wealth of enhancements include simplified policies to speed connection time, a completely re-designed User Interface (UI) (integrated with the firewall), user-based policies, application-aware policies, more troubleshooting and diagnostic tools, Advanced Encryption Standard (AES) support, and support for secure client-to-domain controller traffic. Whew! There's a lot here, and Steve Riley will help you fall in love with Windows networking all over again.

http://www.microsoft.com/emea/spotlight/sessionh.aspx?videoid=352