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 thinks the user’s wireless NIC
has failed. Which of the following network troubleshooting methodology steps should the technician
perform NEXT?

A.
Test the theory to determine the cause.

B.
Implement the solution or escalate as necessary.

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

D.
Re-establish new theory or escalate.