Step 4: Establish the Most Probable Cause

There can be many different causes for a single problem on a network, but with appropriate information gathering, it is possible to eliminate many of them. When looking for a probable cause, it is often best to look at the easiest solution first and then work from there.

Even in the most complex of network designs, the easiest solution is often the right one. For example, if a single user cannot log on to a network, it is best to confirm network settings before replacing the NIC. Remember, though, that at this point you are trying to determine only the most probable cause, and your first guess might be incorrect. It might take a few tries to determine the correct cause of the problem.