Ok, this is pretty simple. I don't have all the parts for it yet, but here is is. I will have 4 computers, and a cable modem, all connected to a 3com 10/100 switch. A P4, an Athlon 1.33, a P3-1000 815ep chipset, and a P3-750 as the NT 4.0/Win2K server. I want the server to be the Primary Domain Controller for the Athlon and the P3-1000. The P4 will be used exclusively for the internet (cable modem). Is this setup possible if all computers are on and transmitting information on the LAN simultaneously? I am assuming it is because they are all connected to a switch, which is like a smart HUB. Thanks for any help.