Final answer:
A MAC address is a unique identifier assigned to network interfaces for communications on a network. It is represented in hexadecimal format and consists of six pairs of digits, separated by colon or hyphen.
Step-by-step explanation:
A MAC address, also known as a Media Access Control address, is a unique identifier assigned to network interfaces for communications on a network. It is represented in hexadecimal format and consists of six pairs of digits, separated by colon or hyphen. Each pair represents an octet or byte, and each octet consists of 8 bits.