cable from PC 1 to router
cable from PC 2 to router
cable from router to DSL or Cable modem
that ought to do it.
If both PC's are in the same room, and there is only ONE cable from that room to the router, a cheap Ethernet switch will fill the bill. You can typically pick one up at CompUSA for less than 20$
http://www.compusa.com/products/prod...43682&pfp=cat3
John