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Network+ Troubleshooting and Tools 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+ Troubleshooting and Tools flashcards as text

  1. A workstation receives an APIPA address (169.254.x.x). What is the most likely cause?

    Answer: The DHCP server is unreachable or not responding

    APIPA (Automatic Private IP Addressing) assigns a 169.254.x.x address when a DHCP server cannot be contacted after multiple attempts.

  2. A network administrator wants to verify that port 443 is open on a remote web server. Which command accomplishes this on a Windows system?

    Answer: telnet 203.0.113.10 443

    Telnet can be used to test TCP port connectivity; a successful connection to port 443 confirms the port is open and accepting connections.

  3. What is the purpose of a Wi-Fi analyzer tool during wireless troubleshooting?

    Answer: Identifying channel utilization, signal strength, and nearby SSIDs to detect interference

    A Wi-Fi analyzer displays nearby access points, their signal strength (RSSI), channels, and security settings to identify interference and optimize channel selection.

  4. A technician runs 'ipconfig /flushdns' on a Windows workstation. What does this command do?

    Answer: Clears the local DNS resolver cache

    The '/flushdns' switch clears the Windows DNS resolver cache, forcing the system to query the DNS server fresh for subsequent name lookups.

  5. During a network upgrade, users report they can access local resources but cannot reach the internet. What should the technician check first?

    Answer: Default gateway configuration on client workstations

    Internet access requires a correctly configured default gateway; if local resources are reachable but internet is not, the gateway is the most likely misconfiguration.

  6. A technician needs to identify which physical port on a switch connects to a specific workstation. Which method is most efficient?

    Answer: Use the switch's MAC address table to match the workstation's MAC to a port

    The switch MAC address table maps learned MAC addresses to specific physical ports, allowing quick identification of which port a device is connected to.

  7. Which of the following describes the purpose of using 'pathping' on a Windows system?

    Answer: It combines traceroute and ping to show latency and packet loss statistics at each hop

    Pathping combines traceroute and ping by first mapping the route, then sending multiple packets to each hop to calculate latency and packet loss per hop.