What is a MAC?

A Computer made by Apple
Memory Address Corruption
Mediocre Apple Computer
Media Access Control

The correct answer is D. Media Access Control.

A MAC address is a unique identifier assigned to network interfaces for communications on the physical network segment. MAC addresses are 48-bit numbers, usually written in the form of six hexadecimal digits separated by colons, for example: 00:11:22:33:44:55.

MAC addresses are assigned by the Institute of Electrical and Electronics Engineers (IEEE) to network interface controller (NIC) manufacturers. The IEEE assigns a block of MAC addresses to each manufacturer, who then assigns individual MAC addresses to their products.

MAC addresses are used in the Media Access Control (MAC) sublayer of the Data Link Layer of the Open Systems Interconnection (OSI) model. The MAC sublayer is responsible for controlling access to the physical network medium.

MAC addresses are used in a variety of networking protocols, including Ethernet, Token Ring, and Fiber Distributed Data Interface (FDDI).

Option A is incorrect. A computer made by Apple is called a Mac.

Option B is incorrect. Memory address corruption is a type of computer error that occurs when data is written to the wrong memory address.

Option C is incorrect. Mediocre Apple Computer is not a valid term.