guys, me and my friends have got a small network of 3 computers set up where we stay. we r using a switch. my friend's gotta cable modem that connects to the computer's ethernet port. what i'd like to ask is, whether we could share the internet connection over the three computers by simply plugging the cable modem to the switch?? i have a doubt that we would need a router to do that.. if we cant, then pls advice..