http://krunchd.com/mod/net/4a2939e0974dc2a2ab1bd15af6b1cc31


http://compnetworking.about.com/cs/routingprotocols/g/bldef_cidr.htm

http://www.webopedia.com/

http://www.practicallynetworked.com/networking/

http://networking.ittoolbox.com/

 
http://en.wikipedia.org/wiki/OSI_model

http://books.google.com/books?id=83pyEZVvVYkC&pg=PA937&lpg=PA937&dq=MCSE+Windows+2000+Network+Infrastructure+Training+Guide&source=bl&ots=o4zVjIarZd&sig=brnw-UvFnUUu8JynEWXminPdAAk&hl=en&ei=6BeZTPHpIYzSsAOFub2IDA&sa=X&oi=book_result&ct=result&resnum=9&ved=0CD8Q6AEwCA#v=onepage&q=MCSE%20Windows%202000%20Network%20Infrastructure%20Training%20Guide&f=false