hardware address

windows

Start / All Programs / Accessories / Command Prompt

ipconfig /all

item Physical Address

Likely there will be more than one listed, so which? Exclude the ones under a heading that says wireless.

For the wired connector, you will see the text media disconnected, or not, depending on whether there’s a live cable plugged in when you run the command.

mac

Finder / Applications / Utilities / Terminal.app

ifconfig en0

The third line reads something like

ether 01:23:45:67:89:ab

Next step?

From www.mun.ca, search for wired network connections.

A.E. 2011.06.16