![]() ![]() This can be contrasted to a programmed address, where the host device issues commands to the NIC to use an arbitrary address ( ). It may also be known as an Ethernet hardware address (EHA), hardware address or physical address (not to be confused with a memory physical address). If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number and may be referred to as the burned-in address (BIA). MAC addresses are most often assigned by the manufacturer of a network interface controller (NIC) and are stored in its hardware, such as the card's read-only memory or some other firmware mechanism. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi. A media access control address (MAC address) of a computer is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment.
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