Which layer in the OSI model do MAC addresses and switches use?

A.
Physical

B.
Data Link

C.
Network

D.
Transport

Explanation:
Section Reference: Defining the Layers in the OSI Model
The Data Link layer establishes, maintains, and decides how transfer is accomplished over the Physical layer.
Devices that exist on the Data Link layer are network interface cards and bridges. This layer also ensures error-free transmission over the Physical layer under LANtransmissions.