_______________ is a unique identifier assigned by the manufacturer to a network adapter. This is written in hexadecimal and is of 6 octets.
"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."
"A MAC address is a unique identifier for network interfaces. It is a 48-bit number (12 hexadecimal characters). They can either be written in either of these formats:
A MAC Address is a unique identifier assigned by the manufacturer to a network adapter