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A standardized data link layer
address that is required for every port or device that connects to a LAN. Other
devices in the network use these addresses to locate specific ports in the
network and to create and update routing tables and data structures. MAC
addresses are 6 bytes long and are controlled by the Institute of Electrical
and Electronics Engineers (IEEE). Also known as a hardware address, a MAC-layer
address, or a physical address. Compare with network address.
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