Originally posted by: StraightPipe
Welcome to anandtech!
2 options
elcheapo non upgradable method (not recomended):
get an extra NIC in your main PC, use it to connect to the net (it will be your "gateway")
then using a "crossover" ehternet cable link the gateway to the 2nd computer
then you setup internet connection sharing on the gateway.
prefered method, get a (router, switch, or hub)router is best, and connect your DSL modem to the router and the 2 pc's to the router (use "patch" ethernet cable (sometimes called straight) to make all 3 connections).
router is most effiecent, it will usually allow 4 users(one will be uplink->goes to modem)
switch and hubs are cheaper, but less effecent/ slower.
you should be able to get a router for less than $50. links sys bsr41 is great! (i think thats the model #)
in the future you should post this type of question in the networking forum!, also do some searches there and you'll find lots of good info