MAC addresses are used in which layer of the OSI model?

Question

Accepted Answer

Data Link Layer - MAC (Media Access Control) addresses are used at the Data Link Layer, which is Layer 2 of the OSI model. A MAC address is a unique identifier assigned to a network device’s network interface card (NIC).

The Data Link Layer uses MAC addresses to deliver data between devices on the same local network (LAN). When a frame is sent over the network, it includes both the source and destination MAC addresses. This helps the network know where to send the frame.

Key facts about MAC addresses:

Used for communication within the same network
Assigned to the hardware (like NICs)
Helps switches deliver data to the correct device
Example format: 00:1A:2B:3C:4D:5E


Tip: If you’re asked which layer uses MAC addresses or which layer a switch operates at, remember both are related to the Data Link Layer.

Conclusion: The Data Link Layer uses MAC addresses to send data between devices on the same network, making it essential for local communication.

MCQ Detailed View