Chapter 6 covers topic 1.8 from the official CompTIA Network+ blueprint: Given a scenario, implement a network troubleshooting methodology. This chapter aims to break down a multiple-step network troubleshooting methodology. Although the scope may be unclear at the beginning, troubleshooting is considered a science and it always involves a pre-determined process. Network engineers who follow this process will continue to get better at this over time, optimizing it based on their experience.
A methodology is needed in order to speed up the problem finding and solving process. Although the methodology can be different from case to case, it is important to use one that best suits your company, network, and internal structure. A proposed methodology includes the following steps:
Step 1: Gather information
Step 2: Identify the affected areas in the network
Step 3: Determine whether anything has changed in the network
Step 4: Establish the most probable cause of the problem
Step 5: Determine whether escalation is necessary
Step 6: Create an action plan and a possible solution
Step 7: Implement and test the solution
Step 8: Analyze the results
Step 9: Document the process and solution
This process is represented by the flow diagram in Figure 6.1 below:
Figure 6.1 – Network Troubleshooting Methodology
In the following sections, we will analyze each of the nine troubleshooting methodology steps.
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Gather Information
Identify the Affected Areas in the Network
Determine whether Anything Has Changed in the Network
Establish the Most Probable Cause of the Problem
Determine whether Escalation Is Necessary
Create an Action Plan and a Possible Solution
Implement and Test the Solution
Analyze the Results
Document the Process and Solution
Summary
Chapter 6 Quiz