This is for anyone that knows anything about modems (Bloo seems the man but I hope anyone else can help)

Why is it my laptop will connect to the net but my 360 won't connect to xbox live for some reason? I was on xbox live about half hour ago then for some reason it d/c so I turned my xbox off and back on again just make sure it isn't the xbox and it wouldn't work, so I took the cable out and plugged it into my laptop and it works fine