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Zorluk: OrtaCompTIA Troubleshooting Methodology

A network administrator is investigating connectivity issues where branch office users report that cloud-hosted file transfers repeatedly stall and disconnect over an IPsec VPN tunnel. The administrator tests a hypothesis by sending ICMP packets with the Don't Fragment (DF) bit set, confirming that an maximum transmission unit (MTU) mismatch across the WAN interface is causing packet fragmentation drops. According to the CompTIA troubleshooting methodology, which action should the administrator perform NEXT?

  1. Establish a plan of action to modify the interface MTU and TCP MSS values while identifying potential impacts on overall network traffic.Cevap
  2. B
    Document the verified MTU root cause, test results, and final resolution details in the central ticketing system.
  3. C
    Ask branch office users to initiate large file transfers to verify that system functionality has been restored.
  4. D
    Gather interface counters and event logs from the edge router to identify the exact scope of the issue.

Cevap

Establish a plan of action to modify the interface MTU and TCP MSS values while identifying potential impacts on overall network traffic.
The CompTIA troubleshooting methodology follows a strict sequence: 1. Identify the problem, 2. Establish a theory of probable cause, 3. Test the theory to determine cause, 4. Establish a plan of action to resolve the problem and identify potential effects, 5. Verify full system functionality and implement preventive measures, and 6. Document findings, actions, and outcomes. Because the administrator has already tested the theory and confirmed the MTU mismatch (Step 3), the immediate next step is Step 4: Establishing a plan of action to resolve the issue while considering potential side effects.

Adım Adım Çözüm

1
Identify the current step in the CompTIA 6-step troubleshooting process based on the scenario details.
The scenario describes that the administrator has tested the hypothesis (ICMP ping with DF bit set) and confirmed the cause (MTU mismatch), completing Step 3: Test the theory to determine cause.
CompTIA troubleshooting requires following a strict sequential workflow.
2
Determine the next sequential phase required by the methodology.
The step immediately following Step 3 (Test theory) is Step 4: Establish a plan of action to resolve the problem and identify potential effects.
Changes must be planned and evaluated for side effects before implementation.
3
Select the choice that corresponds to establishing a plan of action.
Developing a plan to adjust MTU/TCP MSS settings while considering traffic impacts correctly represents Step 4.
Planning actions and assessing potential effects ensures structured change management.

Anahtar Kavram

CompTIA Troubleshooting Methodology Step Sequence
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CompTIA Troubleshooting Methodology

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