I am using a broadband connection using a modem on one computer. Now I want also to use the internet on another computer (in another room in same house). what would be the best way and what hardware it would require
A router. Wireless if you don't want to run a cable, in which case you'll probably need a wireless adapter for the other computer if it's not a laptop. If you do want to run a cable, you may still want a wireless adapter in case you do have some future use for a wireless connection.