how to use ethernet?

hi friends i am mandrake linux 9.1 and i don’t idea how to go to bsnl broadband and somebody is telling you can go to broadband by useing ethernet but how to i enable it and how i find the ethernet card on my system pls tell me

I have a dsl connection and a D-link router.The router is set from my windows OS so that’s not the problem.The problem i think is that i do not know to set my ethernet card or to set up a connection that my pc will recognize it.Please give some details on how to set this up

Normally "netconfig" command in RedHat configure eth0 by default. How can me make it configure eth1 ( second ethernet card )