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    MAC Address Structure

    A MAC (Media Access Control) address is a hardware address assigned to network interfaces. It consists of 6 bytes (48 bits), typically represented as 12 hexadecimal characters.

    Bit 0 of the first byte: 0 = Unicast, 1 = Multicast.

    Bit 1 of the first byte: 0 = Universally Administered (UAA, assigned by IEEE), 1 = Locally Administered (LAA, self-assigned).

    The first 3 bytes form the OUI (Organizationally Unique Identifier), and the last 3 bytes are the device identifier.