A user is having difficulty connecting a laptop to the company’s network via a wireless connection. The user
can connect to the network via a wired NIC. The technician suspects the laptop’s wireless NIC has failed. The
technician performs hardware diagnostics on the wireless NIC and discovers the hardware is working fine.
Which of the following network troubleshooting methodology steps should the technician do NEXT?

A.
Establish a plan of action to resolve the problem.

B.
Test the theory to determine a cause.

C.
Re-establish a new theory or escalate.

D.
Implement the solution or escalate as necessary.