Free CompTIA Network+ N10-009 Network Implementations Practice Test 2026 — CompTIA Network+ (N10-009) Questions

This free CompTIA Network+ N10-009 Network Implementations practice test covers Net+ Domain 2 (~20%) — network implementations, covering routing protocols, switching (VLANs, STP), wireless standards, and SDN/SD-WAN. Each question includes a detailed explanation aligned to the N10-009 exam objectives — perfect for Network+ exam prep.

Key Topics in CompTIA Network+ N10-009 Network Implementations

6 Free CompTIA Network+ N10-009 Network Implementations Practice Questions with Answers

Sample Question 1 — Network Implementations

You are tasked with configuring a new router that will connect to an existing network using OSPF. The existing network uses area 0 for its backbone. Which of the following commands will correctly configure the router to participate in OSPF with the correct area?

  1. A. router ospf 1 network 192.168.1.0 0.0.0.255 area 0 (Correct answer)
  2. B. router ospf 1 network 192.168.1.0 255.255.255.0 area 0
  3. C. router ospf 1 network 192.168.1.0 0.0.0.255 area 1
  4. D. router ospf 1 network 192.168.1.0 255.255.255.0 area 1

Correct answer: A

Explanation: In OSPF configuration, the network command uses a wildcard mask, not a subnet mask. For a /24 network, the correct wildcard mask is 0.0.0.255. Since the existing network uses area 0, the configuration must also specify area 0.

Sample Question 2 — Network Implementations

A network engineer is implementing a new DHCP server in a network segment that already has a DHCP server. What configuration should the engineer use to ensure the new server does not interfere with the existing server?

  1. A. Configure the new server with a different IP address range that does not overlap with the existing server. (Correct answer)
  2. B. Set the new server to a higher priority than the existing server.
  3. C. Use the same IP address range as the existing server to ensure consistency.
  4. D. Disable DHCP on the new server and use it as a backup.

Correct answer: A

Explanation: To avoid IP address conflicts, the new DHCP server should be configured with a non-overlapping IP address range. This prevents both servers from assigning the same IP addresses to different devices.

Sample Question 3 — Network Implementations

You are setting up a network with multiple VLANs and need to ensure that traffic can be routed between them. Which of the following devices should you use to achieve this?

  1. A. Layer 2 switch
  2. B. Router (Correct answer)
  3. C. Hub
  4. D. Access point

Correct answer: B

Explanation: A router or a Layer 3 switch is required to route traffic between VLANs. A Layer 2 switch cannot perform inter-VLAN routing.

Sample Question 4 — Network Implementations

A company is deploying a new wireless network using WPA3. What is one key advantage of WPA3 over WPA2?

  1. A. WPA3 uses a longer encryption key length.
  2. B. WPA3 provides forward secrecy, enhancing security. (Correct answer)
  3. C. WPA3 is compatible with all WPA2 devices.
  4. D. WPA3 requires less processing power than WPA2.

Correct answer: B

Explanation: One of the key advantages of WPA3 is the use of forward secrecy, which ensures that even if a session key is compromised, it cannot be used to decrypt past sessions.

Sample Question 5 — Network Implementations

You are configuring a network switch and need to implement port security to limit the number of devices that can connect to each port. Which configuration step is necessary to achieve this?

  1. A. Enable port mirroring on each port.
  2. B. Set the maximum number of MAC addresses allowed per port. (Correct answer)
  3. C. Configure VLAN tagging on each port.
  4. D. Enable spanning tree protocol on each port.

Correct answer: B

Explanation: Port security involves setting a maximum number of MAC addresses that can be learned on a port. This limits the number of devices that can connect to the port and helps prevent unauthorized access.

Sample Question 6 — Network Implementations

A network administrator needs to configure a DNS server to resolve both IPv4 and IPv6 addresses. Which of the following records must be configured for this purpose?

  1. A. A and MX records
  2. B. A and AAAA records (Correct answer)
  3. C. AAAA and CNAME records
  4. D. MX and PTR records

Correct answer: B

Explanation: A records are used to resolve IPv4 addresses, while AAAA records are used for IPv6 addresses. Both record types are necessary to resolve both IPv4 and IPv6 addresses.

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