Very newb question

I left my 360 in Italy, where i used to have a wireless connection and the wireless adapter;

now that i moved to the US im planning to get a new 360 but i dont have the chance to get a wireless connection.. is it possible to connect direclty the ethernet cable from the 360 to the internet plug or i need a modem between em?

I dont know if i explained myself properly.... anyways thank you.