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Difficulty: MediumTroubleshooting Methodology

A support technician is investigating an issue with a workstation connected to an enterprise wireless network. The user reports frequent dropouts when transferring large architectural renderings over the 2.4 GHz network band. The technician interviews the user, reproduces the issue during heavy file transfers, and formulates a theory that adjacent channel interference on channel 3 is causing severe RF degradation. According to the CompTIA troubleshooting methodology, which of the following actions should the technician perform NEXT?

  1. Temporarily reconfigure the access point to test the connection on a non-overlapping channel, such as channel 6, to confirm if interference resolves.Answer
  2. B
    Deploy a permanent wireless policy mandating all CAD workstations connect via 5 GHz Wi-Fi and record the updated configuration in the company KB.
  3. C
    Adjust the 2.4 GHz radio frequency to operate on channel 2 to minimize channel overlap with neighboring wireless routers.
  4. D
    Replace the underlying distribution switch with an unmanaged Layer 2 switch to route traffic between the wireless network and local storage subnets.

Answer

Temporarily reconfigure the access point to test the connection on a non-overlapping channel, such as channel 6, to confirm if interference resolves.
The technician has identified the problem and established a theory of probable cause (Step 2). According to the CompTIA 6-step troubleshooting methodology, the immediate next step is to test the theory to determine the cause (Step 3). Testing the connection on a standard non-overlapping channel (such as 1, 6, or 11) isolates the variable and confirms whether adjacent channel interference is the true root cause.

Step-by-Step Solution

1
Analyze the completed troubleshooting steps in the scenario.
The technician has completed Step 1 (Identify the problem by gathering information and reproducing the issue) and Step 2 (Establish a theory of probable cause: RF interference on channel 3).
Identifying the current stage in the CompTIA 6-step methodology determines the mandatory next step.
2
Determine the next sequential step in the CompTIA methodology.
The next step is Step 3: Test the theory to determine the cause.
Before establishing a plan of action or implementing permanent changes, the technician must test the theory to confirm or disconfirm the hypothesis.
3
Select the option that evaluates the established theory.
Testing the connection on a standard non-overlapping 2.4 GHz channel (1, 6, or 11) directly evaluates whether adjacent channel overlap on channel 3 was causing the issue.
A controlled test validates the cause without prematurely applying permanent changes or skipping verification steps.

Key Concept

CompTIA Troubleshooting Methodology - Testing the Theory of Probable Cause
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Topics

Troubleshooting Methodology

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