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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.

Read the first 7 Network+ Network Troubleshooting Methodology flashcards as text

  1. A technician suspects a duplex mismatch between a server NIC and a switch port. Which tool would BEST confirm this theory?

    Answer: Switch port statistics / management interface

    The switch management interface shows current duplex and speed settings on each port, allowing direct comparison with the server NIC settings.

  2. Users in one VLAN cannot communicate with users in another VLAN despite both VLANs being configured on the same switch. What is the MOST likely missing component?

    Answer: An inter-VLAN routing device or Layer 3 switch

    Inter-VLAN communication requires a router or Layer 3 switch to route traffic between VLANs; a Layer 2 switch alone cannot forward traffic across VLANs.

  3. A network technician receives multiple trouble tickets simultaneously. According to troubleshooting best practices, what should the technician do FIRST?

    Answer: Prioritize tickets by severity and business impact

    Prioritizing by severity and business impact ensures the most critical services are restored first, minimizing organizational disruption.

  4. Which command would a technician use on a Windows workstation to display the current IP configuration including default gateway?

    Answer: ipconfig /all

    ipconfig /all displays full IP configuration details including IP address, subnet mask, default gateway, and DNS servers.

  5. A technician establishes that a user's laptop has a valid IP address, correct subnet mask, and correct default gateway, but still cannot reach external websites. What should the technician check NEXT?

    Answer: DNS server configuration

    With correct IP, mask, and gateway, an inability to reach websites by name points to a DNS resolution failure.

  6. After applying a fix, a technician wants to ensure the solution did not introduce new problems. Which step in the troubleshooting methodology addresses this?

    Answer: Verify full system functionality

    Verifying full system functionality confirms the fix works and checks that no new issues were introduced by the change.

  7. A technician notices that two switches connected via fiber show link-down status despite the fiber cable appearing undamaged. What is the MOST useful next step?

    Answer: Use an optical power meter to measure signal loss on the fiber

    An optical power meter measures signal loss (attenuation) on fiber links, identifying breaks, dirty connectors, or bend-radius violations not visible to the eye.