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Difficulty: HardCompTIA Troubleshooting Methodology

A network administrator has verified that a recently modified firewall access control list (ACL) blocking TCP port 636 is the root cause of directory authentication failures for hybrid cloud VPN users. The administrator confirmed this theory after testing the ACL modification in a staging environment. According to the CompTIA troubleshooting methodology, which TWO of the following actions should the administrator perform NEXT during the upcoming phase? (Select TWO.)

  1. Assess potential security and operational impacts before applying the revised access control list to the production firewall.Answer
  2. Apply the modified access control list on the production firewall to restore secure directory authentication services.Answer
  3. C
    Conduct end-to-end verification testing across remote VPN clients and configure automated security auditing to prevent future rule regressions.
  4. D
    Log the root cause analysis, administrative rule changes, and final resolution details in the change management ticketing database.

Answer

The administrator should evaluate potential security and operational impacts of the firewall change and implement the updated access control list on the production firewall.
Once a theory of probable cause has been confirmed through testing (Step 3), the network administrator must proceed to Step 4: Establish a plan of action to resolve the problem and implement the solution. This phase requires identifying potential side effects or impacts of the proposed change on production systems and subsequently deploying the fix.

Step-by-Step Solution

1
Identify the current phase completed in the CompTIA troubleshooting methodology.
The technician has already established and tested a theory of probable cause (Step 3: Test the theory to determine cause).
Confirming that TCP port 636 was blocked in staging completes the hypothesis testing step.
2
Determine the mandatory next phase according to the 6-step framework.
The immediate next phase is Step 4: Establish a plan of action to resolve the problem and implement the solution.
CompTIA methodology strictly dictates establishing a plan of action (including identifying potential effects) and then implementing the solution before moving to system verification.
3
Select the appropriate actions that align strictly with Step 4.
Evaluating potential impacts of the ACL change and deploying the fix to production fall directly within Step 4.
Impact assessment ensures change safety, while rule deployment executes the planned resolution.

Key Concept

CompTIA 6-Step Troubleshooting Methodology: Transitioning from Theory Testing (Step 3) to Plan of Action & Implementation (Step 4)
Estimated Time:2m 0s
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CompTIA Troubleshooting Methodology

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