Ethernet a worldwide standard?

This might seem like a silly question but I just want to confirm something. I live in Canada but will be spending the next several months in Europe, mostly in one location in Italy. I would like to bring a small wireless router I have along with me to connect to the existing couple machines there and enable wireless access for my group. This has been ok'ed but the person I spoke to there (who is not technically inclined) suggested I make sure I can use equipment from here on their setup.

Now as far as I know there aren't different versions of ethernet/etc on either side of the Atlantic and everything should work just fine but now I'm questioning that. Obviously electrical outlets/voltage/etc are not the same but is there any difference in terms of the network lines/connectors/voltages/etc?

Thanks in advance for settling what I think is a non-issue, but better safe than sorry.

Ok, thanks Iceblue. That's what I thought but when she questioned me on it I wasn't so sure. Thanks again.