How can I connect 2 computers, and 2 gaming systems with one ethernet port?

Question

My college dorm will not allow routers in the dorms. So I am wondering what we need to connect a desktop, a laptop, a ps3 and an xbox360 with one ehternet port.

Answer 1

You can't do this without a laptop or a switch.

Answer 2

there isnt anyway without a router being used, because each device requires an ip address to get connected,  since the enet cable will only give 1 ip address.