Network troubleshooting methodology

Proper network troubleshooting follows a systematic approach. Rather than guessing solutions to problems based on unclear information and random theories, network professionals who follow a proper troubleshooting methodology perform a specific, organized process that helps them to be more efficient in their problem-solving operations.

The following is a step-by-step network troubleshooting methodology:

1. Identify the problem.
2. Establish a theory of probable cause.
3. Test the theory to determine the cause.
4. Establish a plan of action to resolve the problem and identify potential effects.
5. Implement the solution or escalate as necessary.
6. Verify full system functionality and, if applicable, implement preventive measures.
7. Document findings, actions, outcomes, and lessons learned.

Let’s look at each step in detail:

1. Identify the problem: The first step in troubleshooting any network issue is to identify...