How Can I Set Up An Internet Connection In Linux Mint

I have tried on my behalf, but have reached up to enabling LAN. But it is not getting connected to internet. I have Spectranet broadband and use LAN of 1 Mbps speed. The company has provided info of only MAC address, subnet mask, IP address, default gateway and DNS servers.

Please help me so that I can use Linux successfully as I have tried Ubuntu 8.04, but failed.