CompTIA Network+ Practice Test for Subdomain 1.4 #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 1.4 (Explain common networking ports, protocols, services, and traffic types) 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 260606
10 questions • Single best answer
Question 1
A firewall administrator at an insurance company is reviewing inbound access rules. She needs to create a rule that permits only encrypted web browser traffic to the company's public-facing web servers. Which port and protocol combination should be explicitly allowed?
    Question 2
    A network engineer discovers that a firewall rule is blocking all traffic on port 53 from clients to the server. Shortly after, users report they cannot reach websites by name although they can still reach them by IP address. Which service is being blocked?
      Question 3
      A network administrator needs to configure a firewall policy to allow helpdesk staff to remotely manage Linux servers using encrypted terminal sessions. Which TCP port must be permitted for this traffic?
        Question 4
        A mail server administrator needs to configure an outbound firewall rule to allow the internal mail transfer agent to deliver email to external mail servers on the internet. Which TCP port must be permitted outbound?
          Question 5
          A help desk team remotely accesses Windows workstations and servers to perform troubleshooting and support tasks using the native Windows remote desktop feature. A firewall policy must be updated to permit this specific protocol. Which port should be opened?
            Question 6
            A network monitoring platform polls all network devices at regular intervals to collect CPU utilization, interface statistics, and error counts. A firewall must permit this management traffic to reach the monitored devices. Which port should be allowed inbound to those devices?
              Question 7
              A legacy file transfer application uses FTP to exchange files with a remote server. The application opens a control connection to the server to send commands and receive responses. Which TCP port does the client connect to on the server for the FTP control channel?
                Question 8
                A DHCP client workstation broadcasts a DHCPDISCOVER message when it boots up. The message is sent to the server's DHCP port 67. Which source port does the client use when sending this request?
                  Question 9
                  A network administrator notices widespread certificate validation failures across the organization. Investigation reveals that system clocks on many servers are significantly out of sync with actual time. Which service must be properly configured on all systems to prevent this recurring issue?
                    Question 10
                    A network engineer selects a transport protocol for a real-time video streaming application where occasional frame loss is acceptable but low overhead and minimal delay are critical. Which characteristic makes UDP preferable over TCP for this use case?
                      Answered: 0/10

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