A MAC address (Media Access Control address) is a unique identifier for a device's network interface in a local network. It is assigned by the manufacturer and used for addressing devices at the data link layer of the OSI model. A MAC address consists of 48 bits (usually written as 6 pairs of hexadecimal numbers, for example, 00:1A:2B:3C:4D:5E). Thanks to MAC addresses, switches and other network devices can correctly direct data within the local network.

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