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Difficulty: MediumTroubleshooting Methodology

A network technician is responding to a sudden loss of connectivity between a workstation and an optical storage array following server rack maintenance. In what sequential order should the technician perform the following actions according to the standard CompTIA 6-step troubleshooting methodology?

  1. 1Gather information by interviewing affected users and inspecting the physical status of the fiber optic patch cables and transceiver status LEDs.
  2. 2Establish a theory of probable cause suggesting the fiber optic cable suffered excessive attenuation due to a sharp bend during the rack movement.
  3. 3Use an optical power meter to measure light loss along the fiber link and confirm physical cable degradation.
  4. 4Draft a plan of action to swap the damaged fiber patch cable and execute the replacement during an authorized change window.
  5. 5Test sustained data transfer speeds to confirm connection restoration, and install cable strain-relief clips to prevent future bending.
  6. 6Record the root cause, power meter test results, and replacement cable details into the organization's IT ticketing database.

Answer

The correct sequence follows the CompTIA troubleshooting methodology: 1. Gather information and visually inspect physical fiber links (Identify the problem); 2. Hypothesize that excessive bending caused attenuation (Establish a theory of probable cause); 3. Measure optical signal loss with a power meter (Test the theory); 4. Plan and swap the damaged patch cable (Establish a plan of action & implement solution); 5. Test transfer speeds and install strain-relief clips (Verify full system functionality & implement preventive measures); 6. Log the root cause and repair metrics in the ticketing system (Document findings, actions, and outcomes).
The CompTIA 6-step troubleshooting methodology dictates a sequential progression: 1. Identify the problem by gathering user reports and inspecting physical symptoms; 2. Establish a theory of probable cause based on evidence; 3. Test the theory using diagnostic tools to confirm the cause; 4. Establish a plan of action and implement the solution; 5. Verify full system functionality and implement preventive measures; 6. Document findings, actions, and outcomes.

Step-by-Step Solution

1
Identify the Problem
Interviewed users and conducted visual inspection of fiber link status LEDs.
Troubleshooting always begins by gathering symptoms and establishing recent environment changes.
2
Establish a Theory of Probable Cause
Hypothesized that fiber cable bend radius violation caused optical attenuation.
Developing a theory guides directed diagnostic testing.
3
Test the Theory to Determine Cause
Confirmed physical cable degradation using an optical power meter.
Testing verifies whether the theoretical cause is correct prior to taking action.
4
Establish a Plan of Action and Implement the Solution
Created a replacement plan and installed a new fiber patch cable.
Executing an authorized plan addresses the root cause systematically.
5
Verify Full System Functionality and Implement Preventive Measures
Verified sustained data transfer speeds and added strain-relief clips.
Ensures the fix restored operation and prevents future recurrence.
6
Document Findings, Actions, and Outcomes
Recorded problem details and resolution steps in the ticketing system.
Provides documentation for future reference and knowledge sharing.

Key Concept

CompTIA 6-Step Troubleshooting Methodology
Estimated Time:1m 30s
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Topics

Troubleshooting Methodology

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