(there's a bit more more to it but you will have to do some digging for more information as I can't be bothered to check the exact details right now, clue - multicast and broadcast).
This means that in general, a MAC Address only needs to be unique on the local network.Ī MAC address is a 6 byte number, the first three bytes are the Manufacturer ID and the last three bytes are a unique number. MAC Addresses are only significant within the local network - once your traffic passes through a router then the original MAC Address is lost and replaced with the MAC Address of the outgoing port of the router (at this point, your IP Address becomes far more important).
