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Difficulty: HardCompTIA Troubleshooting Methodology

A network engineer troubleshooting a loss of network redundancy on a core switch stack has confirmed that a mismatched VTP domain configuration was the root cause by successfully validating the hypothesis in a staging lab. Following the CompTIA troubleshooting methodology, the engineer is now advancing to the immediate NEXT phase before implementing any modifications on the production network. Which of the following actions should the engineer perform during this phase? (Select TWO.)

  1. Outline a step-by-step implementation plan detailing the exact configuration commands needed to align the VTP domain settings.Answer
  2. Evaluate the risk of potential service disruption to downstream trunk links and identify necessary change control approvals.Answer
  3. C
    Update the enterprise network documentation and record the resolution details in the ticketing system.
  4. D
    Execute a full ping sweep across all VLANs and verify that redundant links have transitioned to a forwarding state.

Answer

The engineer must outline a step-by-step implementation plan detailing the configuration changes and evaluate the risk of potential service disruption while identifying change control approvals.
According to the CompTIA troubleshooting methodology, after testing a theory and confirming the root cause (Step 3), the technician must proceed to Step 4: 'Establish a plan of action to resolve the problem and identify potential effects'. Developing a clear step-by-step implementation plan and identifying potential risks or side effects on production traffic directly satisfy the requirements of Step 4.

Step-by-Step Solution

1
Identify the current phase completed in the CompTIA troubleshooting methodology.
The engineer confirmed the root cause in a lab, which completes Step 3: 'Test the theory to determine cause'.
Determining which phase was completed establishes where the technician is in the overall sequence.
2
Determine the immediate next sequential step in the methodology.
The next phase is Step 4: 'Establish a plan of action to resolve the problem and identify potential effects'.
CompTIA requires establishing a formal plan and assessing side effects prior to implementing any production changes.
3
Select the activities that correspond strictly to Step 4.
Formulating a step-by-step implementation plan and evaluating side effects / change control requirements belong to Step 4.
Implementation tasks, verification, and final documentation belong to subsequent steps in the methodology.

Key Concept

CompTIA 7-Step Troubleshooting Methodology Sequence
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Topics

CompTIA Troubleshooting Methodology

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