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Network+ Network Troubleshooting Methodology Flashcards

7 cards from real COMPTIA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A technician is troubleshooting intermittent connectivity drops on a switch port. After checking cables and replacing them with known-good spares, the issue persists. What is the BEST next step?

    Answer: Check the switch port statistics for errors and collisions

    Examining switch port statistics for errors, collisions, and CRC counts helps identify whether the problem is physical layer noise or a duplex mismatch.

  2. During troubleshooting, a technician confirms that a problem exists but cannot reproduce it consistently. Which troubleshooting step does this situation complicate most?

    Answer: Test the theory

    Testing a theory requires reproducing the problem under controlled conditions; intermittent issues make it difficult to verify whether a proposed fix actually resolved the root cause.

  3. A user reports they can reach local network resources but cannot browse the internet. A ping to 8.8.8.8 fails, but pinging the default gateway succeeds. What is the MOST likely cause?

    Answer: The default gateway is misconfigured or the upstream route is broken

    Successful gateway ping with failed external ping indicates routing beyond the gateway is broken, pointing to a misconfigured or unreachable upstream route.

  4. Which troubleshooting approach starts at the application layer and works toward the physical layer?

    Answer: Top-down approach

    The top-down approach begins at Layer 7 (Application) and descends through the OSI model layers toward Layer 1 (Physical).

  5. After implementing a fix for a network issue, a technician verifies full functionality and then documents the solution. What critical step is MOST often skipped at this stage?

    Answer: Implementing preventive measures

    Implementing preventive measures—such as updating configurations, firewall rules, or monitoring thresholds—is frequently overlooked after a fix is confirmed working.

  6. A technician uses the divide-and-conquer troubleshooting method. On which OSI layer does this approach typically begin?

    Answer: Layer 3 – Network

    Divide and conquer typically starts at Layer 3 (Network) by testing IP connectivity, then moves up or down based on results.

  7. When a technician documents a resolved network incident, which detail is LEAST important to include?

    Answer: The technician's personal opinion of the network design

    Documentation should be objective and factual; personal opinions about network design are not relevant to incident records.