CompTIA Network+ Practice Test for Subdomain 1.1 #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 1.1 (Explain concepts related to the Open Systems Interconnection (OSI) reference model) 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 260603
10 questions • Single best answer
Question 1
A systems administrator at a government agency is troubleshooting a connectivity issue and suspects the problem lies at the layer responsible for logical addressing and determining the path that data takes across networks. Which OSI layer should the administrator focus on?
    Question 2
    A network engineer examines a captured frame and identifies a header field that contains both a source and destination hardware address. These addresses are used to deliver the frame within the local network segment. At which OSI layer is this addressing information added?
      Question 3
      A host is preparing to transmit a large file to a remote server. The operating system divides the data into smaller units, assigns sequence numbers to each piece, and prepares it for reliable delivery over the network. At which OSI layer does this segmentation and sequencing occur?
        Question 4
        A router receives an IP packet, reads the destination address, consults its routing table, and forwards the packet out the appropriate interface toward the next hop. Which OSI layer governs this process?
          Question 5
          A network architect is categorizing networking devices by OSI layer. He identifies that hubs and repeaters operate at the layer that deals exclusively with the transmission and reception of raw binary data over a physical medium. Which OSI layer is this?
            Question 6
            A developer is building a web application that uses HTTP to exchange requests and responses with client browsers. At which OSI layer does the HTTP protocol operate?
              Question 7
              A network engineer analyzes a VoIP session and identifies the protocol responsible for establishing the call, maintaining the conversation dialogue between the two endpoints, and gracefully tearing down the connection when the call ends. Which OSI layer performs these functions?
                Question 8
                A security analyst observes that data is being encrypted and compressed before being handed up to the application for processing. The layer handling these format-conversion and encryption operations sits between the Session and Application layers. Which OSI layer is performing these functions?
                  Question 9
                  A network student is studying OSI layer protocol data units. She asks her instructor what the correct term is for the PDU at the Transport layer. What is the correct answer?
                    Question 10
                    A technician captures network traffic and identifies a frame with a destination MAC address of FF:FF:FF:FF:FF:FF. This all-ones broadcast address instructs all devices on the local segment to process the frame. At which OSI layer is this broadcast addressing processed?
                      Answered: 0/10

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