Networking Fundamentals – What is a MAC? In the context of computer networks (not brand names), identify the correct meaning of the term MAC.

Introduction / Context:
The term “MAC” frequently appears in networking, Wi-Fi configuration, and Ethernet documentation. It is vital to distinguish the networking meaning from similarly named consumer products or unrelated jargon.

Given Data / Assumptions:

• Context is network communications.
• We are not discussing Apple’s Macintosh computers.
• We want the technical layer definition used in data links.

Concept / Approach:
MAC stands for Media Access Control. In the OSI model, the MAC sublayer is part of Layer 2 (Data Link). It deals with addressing (MAC addresses), framing, and controlling how devices access the shared medium (for example, CSMA/CD in classic Ethernet, CSMA/CA in Wi-Fi). Each network interface typically has a unique MAC address burned into hardware or assigned virtually.

Step-by-Step Solution:

Verification / Alternative check:
Operating system tools (for example, ipconfig /all, ifconfig, or network settings) show each adapter’s MAC address, confirming the Data Link meaning of the acronym.

Why Other Options Are Wrong:

• A Computer made by Apple / Mediocre Apple Computer: Brand references, not the networking concept.
• Memory Address Corruption: A bug/condition in programming, not the definition of MAC in networks.

Common Pitfalls:
Confusing MAC (Media Access Control) with message authentication code, which is a cryptographic integrity mechanism. Both are valid in different contexts, but this question clearly targets networking.

Final Answer:
Media Access Control