CompTIA A+ Core 2 Practice Questions: Networking/Security

9 free, exam-style CompTIA A+ Core 2 (220-1202) practice questions covering Networking/Security, each with the correct answer and an explanation. Start a timed exam below, or scroll on to read through the questions.

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Networking/Security practice questions

Answers and explanations are shown. Take the timed exam above to test yourself first.

Q1. A user wants to prevent unauthorized devices from connecting to their SOHO wireless router. Which of the following security measures would be MOST effective for this specific goal, assuming strong encryption is already in place?

  • A.Disabling SSID broadcast
  • B.Changing the default admin password
  • C.Configuring MAC filtering✓ Correct
  • D.Enabling QoS
Explanation: MAC filtering allows you to create a list of allowed (or denied) MAC addresses. While not foolproof (MAC addresses can be spoofed), it adds a layer of control over which specific devices can connect to the network. Learn more.

Q2. A technician is setting up a new SOHO router. To ensure that only specific, pre-approved client devices can connect to the wireless network, which feature should be configured?

  • A.Port forwarding
  • B.DMZ (Demilitarized Zone)
  • C.WPA3 encryption
  • D.MAC address filtering✓ Correct
Explanation: MAC address filtering allows an administrator to define a list of MAC addresses that are permitted (or denied) access to the wireless network. While not foolproof (MAC addresses can be spoofed), it adds a layer of access control. Learn more.

Q3. Which of the following wireless security standards is considered the MOST secure for modern Wi-Fi networks?

  • A.WEP
  • B.WPA
  • C.WPA2-PSK (AES)
  • D.WPA3-Personal✓ Correct
Explanation: WPA3-Personal offers more robust security than WPA2 by using Simultaneous Authentication of Equals (SAE), providing stronger protection against password guessing attempts. WEP and WPA are outdated and insecure. Learn more.

Q4. Which protocol provides encrypted file transfer over SSH?

  • A.SFTP✓ Correct
  • B.TFTP
  • C.Telnet
  • D.SNMPv1
Explanation: SFTP uses SSH to provide encrypted authentication and file transfer. Learn more.

Q5. Why would a technician enable a guest wireless network on a SOHO router?

  • A.To isolate visitor traffic from private internal devices✓ Correct
  • B.To disable all encryption
  • C.To increase toner density
  • D.To convert IPv4 to VGA
Explanation: A guest network gives visitors Internet access while keeping them separated from trusted local resources. Learn more.

Q6. Which wireless security standard replaced WPA2 as the stronger modern option?

  • A.WPA3✓ Correct
  • B.WEP
  • C.TKIP-only WPA
  • D.Open authentication
Explanation: WPA3 improves wireless authentication and encryption protections compared with WPA2. Learn more.

Q7. Which wireless setting hides the network name from normal beacon displays but does not provide strong security?

  • A.Disable SSID broadcast✓ Correct
  • B.Enable WPA3
  • C.Use RADIUS
  • D.Enable DHCP reservations
Explanation: Hiding SSID broadcast is not a strong control because the network name can still be discovered from wireless traffic. Learn more.

Q8. A user wants to prevent unauthorized devices from connecting to their SOHO wireless router by specifying a list of allowed hardware addresses. Which security measure should they configure?

  • A.Disabling SSID broadcast
  • B.Changing the default administrator password
  • C.Configuring MAC filtering✓ Correct
  • D.Enabling Quality of Service (QoS)
Explanation: MAC (Media Access Control) filtering allows an administrator to create a whitelist of MAC addresses that are permitted to connect to the wireless network, or a blacklist of those that are denied. This provides a layer of control over which specific devices can access the network. Learn more.

Q9. What is a significant security risk associated with leaving the default administrator username and password unchanged on a SOHO router?

  • A.It will cause the router to overheat and fail.
  • B.It limits the number of devices that can connect to the network.
  • C.It makes the router highly vulnerable to unauthorized access and compromise by attackers.✓ Correct
  • D.It prevents the router from receiving firmware updates.
Explanation: Default credentials for routers are widely known and easily found online. Attackers can scan for devices using these defaults to gain unauthorized access, change settings, install malware, or use the router as part of a botnet. Learn more.

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