Network Ethernet Cable Adaptor?

[Rhys89]

Is it possible to get an adaptor so i can have 1 network cable going to my Xbox 360 and 1 for my LAN with another computer?

I only have one port, any ideas?

 

[ows90]

You could get a network switch:
Netgear FS605 5 Ports 10/100 Platinum Switch