Final answer:
Option c)Three octets of a MAC address represent the Organizationally Unique Identifier (OUI). The MAC address comprises six hexadecimal numbers, and the OUI is made up of the first three.
Step-by-step explanation:
The OUI (Organizationally Unique Identifier) part of a MAC address is represented by c)three octets.
A MAC address is typically written as a series of six hexadecimal numbers separated by colons (for example, 00:1A:2B:3C:4D:5E). The first three of these six numbers (00:1A:2B in the example) make up the OUI. This identifier is assigned by the IEEE to the manufacturer of the network device and is used to uniquely identify the vendor of that piece of hardware.