Learn in the textbookWireless LAN and Wi-Fi
DefinitionA MAC address (MACアドレス) is a physical address, unique to each device, that is assigned to a network device's communication hardware at manufacture.
ExplanationIt is written as pairs of hexadecimal digits separated by hyphens, as in 00-1A-2B-3C-4D-5E. Within the same network, this number tells which device is on the other end of the communication.
AnalogyIt is like the serial number stamped on each product. Even with identical models lined up, the number picks out the one unit.
Memory hookMAC stands for Media Access Control and has nothing to do with Mac computers.