Socket programing

http://www.prasannatech.net/search/label/Socket%20Programming - use ful site.

http://www.javaworld.com/jw-12-1996/jw-12-sockets.html

http://www.slideshare.net/jignesh/socket-programming-tutorial from slideshare

NUS Using Others tutorials. About Networking but much useful

IP ADDRESSING TUTORIAL

http://www3.rad.com/networks/2003/ipaddr/1.htm

Networks For Beginners

http://www3.rad.com/networks/1997/nettut/mainmenu.html

see under Lectures: here.

http://www.comp.nus.edu.sg/~ananda/CS3103.htm

Networking notes from college site.

http://philipmrussell.com/networkingconcepts/