Networking links

The links below provide a good crash course introduction to game network programming:

Networking for Games 101 (http://www.gamedev.net/reference/articles/article1138.asp)
FAQ Multiplayer and Network Programming (http://www.gamedev.net/community/forums/showfaq.asp?forum_id=15)
Introduction to Multiplayer Game Programming (http://trac.bookofhook.com/bookofhook/trac.cgi/wiki/IntroductionToMultiplayerGameProgramming)
The Quake3 Networking Model (http://trac.bookofhook.com/bookofhook/trac.cgi/wiki/Quake3Networking)
Unreal Networking Architecture (http://unreal.epicgames.com/Network.htm)
Networked Physics (http://www.gaffer.org/articles/NetworkedPhysics.html)
Beej's Network Guide (http://beej.us/guide/bgnet/)