Serial port MAC address

[alk1000]

I'm just curious why the serial ports on cisco routers don't have a MAC @. Do they use the 0xFF?

Any clue(s) and/or hyperlink(s) are welcomed

Thanks

[thiland]

MAC addresses are a layer-2 encapsulation/addressing scheme for ethernet networks.

Serial ports would use othe layer-2 encapsulations, such as frame relay (DLCI #'s), PPP, etc.