Well i was looking for some good tutorial's today to try and gain some knowledge,Where im laking most in networking and programing and i came across this site with load's of tutorial's.To help people learn and understand more about the workings of packet sniffing and creating packet's in c.There are load's of video's that cover alot of stuff on this site some of you guy's might find use full.
http://www.security-freak.net