Acronym for Media Access Control. It is the unique Ethernet card ID number found in network computers. These addresses are necessary in local area network (LAN) computers in order for them to communicate. The addresses are unrelated to the Macintosh computer.
This is a unique serial number residing in the firmware of a network interface card that identifies the network card on the network.
Media Access Control address; also called hardware or physical address. A layer 2 address associated with a particular network device. Most devices that connect to a LAN have a MAC address assigned to them as they are used to identify other devices in a network. MAC addresses are 6 bytes long.