Why does the connection drop using Ethernet port

I would highly reccomend using a ethernet cable directly from the lan port of the xbox into the lan port of the router. If the console is far away from the router, then you can experience network drops or slow speeds. A ethernet connection will be the strongest

ok so does anyone know why my xbox 360 s cant connect to live using wifi but the one that has an Ethernet cord can?? and no its not a moden, ip, or port forwarding problem

Wireless is working fine. However I get signal drop in my area which is why I paid for a phone line to be connected to my room. I have tried an alternate, new ethernet cable and it was worse, it would barely let me connect at all; I even got very frequent
error messages. If I look at available networks on the xbox when the ethernet cable is in the wired box will keep un-ticking and re-ticking constantly. When un-ticked it will give me an xbox message stating to connect an ethernet to use wired; as if there
were no cable at all. I'm starting to think that the console has a faulty ethernet port.

Where does the Ethernet cable, that goes from the WAN port of the Netgear router, connects to?

Ok so I think I finally figured it out. I disconnected the Ethernet cable and connected thru WiFi and i had no connection drops. Since I have tried multiple Ethernet cords it has to be the Ethernet port/chip. So my next question would be is that replaceable?
Or am I stuck playing wireless?