Good links

Inter Process Communication:

http://www.cs.cf.ac.uk/Dave/C

TCP:

http://www.cs.berkeley.edu/~kfall/EE122/lec23/sld001.htm

http://www.cs.berkeley.edu/~kfall/EE122/

C:

http://www.interviewmantra.net/2008/11/list-of-all-c-interview-questions-in.html