A MAC address is what?

• A. Media Access Control Unique address embedded in network connected devices.
• B. Machine Address Code
• C. Media Allocation Channel
• D. Management Access Chip

Answer: (A)

A MAC address is a unique hardware address assigned to a network interface card by the manufacturer, used to identify devices on a local network at the data link layer. It stays tied to the hardware (often burned into the device) and is how frames on Ethernet or Wi‑Fi are delivered to the correct device within the same LAN segment. The address is typically 48 bits long and shown as six hexadecimal pairs like 01:23:45:67:89:AB, though other formats exist for newer standards. Because it’s a hardware identifier, it helps ensure each device on a network can be distinguished from others, independent of software IP addresses that can change. The other options don’t reflect the standard meaning of MAC addresses (the terminology and purpose don’t match how these hardware identifiers are defined).