ccna vlsm and flsm

sarge

i am in ccna now , but i cant clear knowledge in vlsm and flsm and i cant do any math so please anybody tell me how to clear my prob in vlsm , i want to calculate vlsm in very short time. pls help, i face many prob.i want to learn from basics, have any site or **** or any book pls tell me



pls help im in big prob

Ame M

you can check out this URL
it is very simple
make sure to read and understand all the 3 pages in this page:

http://www.tcpipguide.com/free/t_IPVariableLengthSubnetMaskingVLSM.htm