How global computer Network works

[chandrasekar-sgc]

I want to know all network equipment's working and application. Hacking of networking.

[EINSTEIN_007]

All computers that are connected to the Internet are part of a network, the one that you have in your home also. Like for instance when you use a modem and dial a local number to connect to an Internet Service Provider. You can get far more better explanation from this link - http://en.wikipedia.org/wiki/Computer_network