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MAC (Media Access Control) Address - Definition

MAC is an abbreviation for Media Access Control. A MAC address is also known as the hardware address or the adapter address. It is a number that acts like a name for a particular network adapter. For example, the network cards and/or built-in network adapters in two different computers will have different names, or MAC addresses, as would an Ethernet adapter and a Wireless adapter in the same computer. Each MAC address is a unique 12-digit hexadecimal ID number, which is hard coded to the network adapter by the factory, and is used by devices to direct packets of information to other devices on the network.

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