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Zorluk: OrtaCompTIA Troubleshooting Methodology

A network technician is investigating a situation where users at a remote branch office cannot reach external websites following a WAN router update. The technician gathered information and established a theory that an access control list (ACL) on the edge router was inadvertently blocking outbound DNS traffic on UDP port 53. The technician then applied a temporary test rule and performed a lookup, confirming that the ACL was indeed the root cause of the failure. According to the CompTIA troubleshooting methodology, which of the following actions should the technician perform NEXT?

  1. Establish a plan of action to resolve the issue and implement the solution.Cevap
  2. B
    Verify full system functionality across all affected branch workstations and implement preventive measures.
  3. C
    Document the confirmed root cause, configuration changes, and testing outcomes in the network management system.
  4. D
    Question affected users to determine if any additional network changes occurred prior to the outage.

Cevap

Establish a plan of action to resolve the issue and implement the solution.
Under the CompTIA troubleshooting methodology, once a technician tests a theory of probable cause and confirms the underlying issue (Step 3), the immediate next step is to establish a plan of action to resolve the problem and implement the solution (Step 4).

Adım Adım Çözüm

1
Identify the completed methodology phase from the scenario.
The technician completed identifying the problem (Step 1), establishing a theory (Step 2), and testing the theory to confirm the cause (Step 3).
Testing a temporary test rule to confirm the ACL root cause completes the 'Test the theory to determine cause' phase.
2
Determine the next sequential phase in the 6-step CompTIA troubleshooting methodology.
Following Step 3 (Test the theory), the next sequential phase is Step 4: Establish a plan of action to resolve the problem and implement the solution.
The CompTIA methodology strictly requires establishing a solution plan and implementing it before verifying system functionality or documenting results.

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CompTIA 6-Step Troubleshooting Methodology Sequence
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CompTIA Troubleshooting Methodology

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