Does anyone know if I can put a 2 line ethernet splitter on the back of my cable modem and have 1 line go to an Airport base station and line 2 go to my computer? I want my comp off the network, ...

I have a cable connection from Time Warner - the cable goes into a modem and is also going into a tuner box connected to an old TV. I'd like to connect the cable TV to the receiver next to the big ...