CompTIA Network+ Practice Test for Subdomain 5.5 #03

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Welcome to today’s CompTIA Network+ practice test!

This practice test uses our new UI!

Today’s practice test is based on Subdomain 5.5 (Given a scenario, use the appropriate tool or protocol to solve networking issues) from the CompTIA Network+ N10-009 objectives.

This beginner-level practice test is inspired by the CompTIA Network+ (N10-009) exam and is designed to help you reinforce key networking concepts on a daily basis.

These questions are not official exam questions, nor are they brain dumps, but they reflect topics and scenarios relevant to the Network+ certification. Use them to test your knowledge, identify areas for improvement, and build daily cybersecurity habits.

Note: CompTIA and Network+ are registered trademarks of CompTIA. This content is not affiliated with or endorsed by CompTIA.

To choose CompTIA Network+ practice tests based on specific domains/subdomains, click that link.

Recommended read: Ultimate CompTIA Network+ Study Guide (2026)

CompTIA Network+ Practice Test of the Day 260628
10 questions • Single best answer
Question 1
A junior network technician at a healthcare organization is asked to verify whether a remote server at 10.5.2.20 is reachable from a workstation. The network team wants a quick round-trip latency check with minimal overhead. Which command-line tool should the technician run first?
    Question 2
    A network administrator at a regional university is investigating a slow connection between two campuses. Users report high latency, but the destination is reachable. Which tool shows the path packets take and identifies the hop with the delay?
      Question 3
      A security engineer at a financial services firm is asked to audit all active devices and open ports on a new network segment before it goes live. The team needs to identify hosts and services across the entire subnet. Which tool is most appropriate?
        Question 4
        A SOC analyst at a healthcare organization suspects a workstation is communicating with a command-and-control server. The analyst needs to capture live packet data on the Linux host to confirm the suspicious traffic. Which tool should be used?
          Question 5
          A network engineer at an e-commerce company is troubleshooting DNS resolution failures reported by customers. The engineer wants to query a specific DNS server to verify that a domain's A record resolves correctly. Which tool is designed for this purpose?
            Question 6
            A network administrator at a retail company is investigating why a device suddenly lost network access after a port change. The administrator has resolved the device's MAC address from the ARP table. Which switch command maps that MAC address to a physical port?
              Question 7
              A wireless engineer at a convention center is experiencing poor performance on the 5GHz band after a vendor event. The engineer suspects excessive channel overlap from competing APs in the space. Which tool should be used to identify channel utilization and interference?
                Question 8
                A network technician at a manufacturing plant is trying to identify the upstream switch model and port connected to a newly installed server. Physical labels on the patch cable are missing. Which protocol provides neighbor discovery information directly from the switch?
                  Question 9
                  A field technician at a data center is troubleshooting a fiber link that shows as down after a recent patch panel change. The technician needs to quickly identify a physical break in a short fiber run. Which tool is most appropriate?
                    Question 10
                    An incident responder at a financial institution suspects a compromised Windows workstation is maintaining unauthorized outbound connections. The responder needs to list all active TCP connections and their states on the host. Which command should be run?
                      Answered: 0/10

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