When troubleshooting a network failure, which layer of the Open System Interconnection (OSI) is
faulty when you do not receive a link light on he NIC?

A.
application

B.
physical

C.
data

D.
network

Explanation:
The Physical layer defines all the electrical and physical specifications for devices. In particular, it
defines the relationship between a device and a physical medium. This includes the layout of pins,
voltages, and cable specifications.