What is a MAC address?
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A MAC (Media Access Control) address is the unique 48-bit hardware address of a LAN card, usually stored in the network adapter card’s ROM.
The MAC address is a unique identifier that manufacturers assign to a network card or device. It is also known as a physical address represented by hexadecimal digits. Each MAC address is unique worldwide and, in theory, is fixed for each device.
Each MAC address includes six pairs of numbers. The first three pairs help to identify the manufacturer, and the next three to the specific model. It is important to remember that a computer may have a variety of hardware to connect to networks; thus, it is common to have a MAC address for Ethernet, one for Wi-Fi, and another for Bluetooth.