A+ Diagnosing DNS and IP Configuration Errors Quiz

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Quizzes Created: 8865 | Total Attempts: 106,055
| Questions: 20 | Updated: Aug 12, 2026
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1. A computer shows 'This connection has limited or no connectivity' in Windows. What is the likely cause?

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About This Quiz
A+ Diagnosing Dns and IP Configuration Errors Quiz - Quiz

This quiz tests your ability to diagnose and resolve DNS and IP configuration issues in network environments. You'll evaluate common network problems, interpret diagnostic output, and apply troubleshooting methodologies to restore connectivity. Essential for IT professionals preparing for A+ certification and real-world network support roles.

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2. The command pathping combines the functionality of which two diagnostic tools?

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3. A user can access internal resources but not the internet. What should you verify first?

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4. You suspect a client has a duplicate IP address on the network. What command helps confirm this?

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5. A network segment uses 192.168.1.0/25. How many usable host addresses are available?

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6. Which of the following indicates a successful DNS query using nslookup?

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7. The ipconfig /renew command fails on a DHCP client. What is the most likely reason?

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8. A host has two network adapters with different subnets. Both are configured as default gateways. What problem may occur?

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9. What is the purpose of the default gateway in a network configuration?

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10. The tracert command to a remote host stops at an intermediate router. What does this indicate?

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11. A user cannot access any websites. You run ipconfig and see 169.254.x.x as the IP address. What does this indicate?

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12. Which command displays all active TCP/IP connections and listening ports on a Windows system?

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13. A client receives 'Cannot resolve hostname' error when browsing. What should you check first?

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14. What subnet mask is used for a /24 network?

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15. A ping to localhost (127.0.0.1) fails. What does this indicate?

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16. Which of the following is a valid Class B private IP address range?

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17. A workstation has a static IP but cannot communicate with the DHCP server. What is the primary issue?

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18. What does the command nslookup 8.8.8.8 do?

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19. A host can ping the default gateway but cannot reach external servers. What is the most likely cause?

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20. Which command is used on Windows to clear the DNS resolver cache?

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A computer shows 'This connection has limited or no connectivity' in...
The command pathping combines the functionality of which two...
A user can access internal resources but not the internet. What should...
You suspect a client has a duplicate IP address on the network. What...
A network segment uses 192.168.1.0/25. How many usable host addresses...
Which of the following indicates a successful DNS query using...
The ipconfig /renew command fails on a DHCP client. What is the most...
A host has two network adapters with different subnets. Both are...
What is the purpose of the default gateway in a network configuration?
The tracert command to a remote host stops at an intermediate router....
A user cannot access any websites. You run ipconfig and see...
Which command displays all active TCP/IP connections and listening...
A client receives 'Cannot resolve hostname' error when browsing. What...
What subnet mask is used for a /24 network?
A ping to localhost (127.0.0.1) fails. What does this indicate?
Which of the following is a valid Class B private IP address range?
A workstation has a static IP but cannot communicate with the DHCP...
What does the command nslookup 8.8.8.8 do?
A host can ping the default gateway but cannot reach external servers....
Which command is used on Windows to clear the DNS resolver cache?
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