I own Airtel Broadband connection which comes with huawei modem. Recently i bought a laptop. I would like to setup a network between my modem, PC running on XP and laptop running on win7. Am okay with a wired network!

Main idea is to have data/file sharing between PC and laptop while both can access internet at the same time. Pls suggest !! am confused as to go for a switch or a router for my need. Am planning to use PC just for downloads and dumping stuff, since it wont be having monitor or keyboard(for PC) i would need to do a remote login from laptop to pc.

Thanks a ton