First Step in Network Troubleshooting Methodology

N10-009 By islever Editorial Last updated

Explain the troubleshooting methodology.

Short answer

C Question the user to gather detailed information about the reported symptom and verify what checks were previously performed before forming any technical theories.

Question

A network administrator receives a ticket from a user. The user reports that they cannot access any websites and that they have already checked everything on their computer. Which of the following is the first action the administrator should take?
  1. Divide and conquer.
  2. Establish a theory of probable cause.
  3. Question the user. Correct Answer
  4. Document the findings.

Key Takeaways

The main trap is assuming the user's self-diagnosis ('I checked everything') is accurate; the exam tests whether you prioritize information gathering over immediate assumption-based theorizing.

This page explains why questioning the user is the correct first action in the CompTIA troubleshooting methodology when a user reports a network issue they believe they have already checked.

Common mistake: Choosing 'Establish a theory of probable cause' is a common mistake because candidates want to jump to solutions, but the methodology strictly requires verifying facts and gathering data from the user before hypothesizing.

Expert Analysis

The scenario involves a user reporting an inability to access websites, with the complication that the user has already "checked everything on their computer." This implies the user believes the issue is not local, or they have performed superficial checks. The administrator must follow the CompTIA troubleshooting methodology, which begins with Identify the Problem.

In this first step, the technician must gather information to understand the scope and symptoms. While the user claims they checked their computer, the administrator needs to verify what was actually done and clarify the exact nature of the failure (e.g., DNS resolution vs. connectivity, specific sites vs. all). Therefore, Questioning the user is the critical first action to validate the symptom and determine if the issue lies with the client, the network, or external services.

Option A, Divide and Conquer, is a strategy used later in the process, typically after theories are formed. Option B, Establish a theory of probable cause, comes after gathering information; you cannot form a valid theory without first understanding the full context through questioning. Option D, Document the findings, is essential but occurs throughout the process, including at the end; it is not the first action to take when receiving a new ticket. The comments correctly identify that gathering details via questioning is the initial step to distinguish between user error, local configuration issues, and broader network outages.

Exam Strategy

Always recall the six steps of the CompTIA troubleshooting methodology: 1. Identify, 2. Establish Theory, 3. Test, 4. Plan, 5. Implement, 6. Verify/Document. When a question asks for the 'first' action in a new scenario, it almost always refers to gathering information (Identify), which means talking to the user or checking logs, not jumping to fixes or theories.

Frequently Asked Questions

Why not establish a theory of probable cause first?

You cannot establish a valid theory without sufficient data. The methodology requires you to first identify the problem by gathering information from the user to understand the scope and symptoms accurately.

Does 'Divide and Conquer' apply to the first step?

No. Divide and Conquer is a testing strategy used during the 'Test the Theory' phase to isolate components. It is not an initial information-gathering technique.

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Discussion 3 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 3

  1. AnderSpain 👍 1 Answered C
    For Question 684, the correct answer is C. Question the user. 🔍 Why is this the correct answer? Methodology phase: According to CompTIA's official troubleshooting steps, Step 1 is "Identify the problem." Step 1 Actions: Within this initial stage, technicians should gather as much information as possible by asking the user direct questions, verifying symptoms, and inquiring whether any recent changes have been made, even if the user claims to have checked their own computer.
  2. ERB14 👍 1 Answered C
    Question the user to gather details, clarify symptoms, determine what changes were made, and establish the scope of the problem.
  3. Skri113xX 👍 1 Answered B
    Is B the consensus here? It seems right to me.

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