Online Practice MCQ Test on Subnetting and Master IP Addressing

Test and improve your subnetting skills with this MCQ test. Master IP addressing, subnet masks and CIDR notation to enhance your networking knowledge and excel in IP addressing challenges.

📌 Important Exam Instructions

  • ✅ This is a free online test. Do not pay anyone claiming otherwise.
  • 📋 Total Questions: 30
  • ⏳ Time Limit: 30 minutes
  • 📝 Marking Scheme: +1 for each correct answer. No negative marking.
  • ⚠️ Avoid page refresh or closing the browser tab to prevent loss of test data.
  • 🔍 Carefully read all questions before submitting your answers.
  • 🎯 Best of Luck! Stay focused and do your best. 🚀

Time Left (min): 00:00

1. What is the default subnet mask for a Class A IP address?

  • 255.255.255.0
  • 255.0.0.0
  • 255.255.0.0
  • 255.255.255.255

2. How many subnets can be created by borrowing 3 bits from the host portion of a Class C network?

  • 8
  • 4
  • 16
  • 32

3. What is the subnet mask for a network with a /26 prefix?

  • 255.255.255.240
  • 255.255.255.192
  • 255.255.255.128
  • 255.255.255.224

4. How many host addresses are available in a subnet with a subnet mask of 255.255.255.0 (Class C)?

  • 254
  • 256
  • 512
  • 1024

5. What is the network address for the IP 192.168.10.12/28?

  • 192.168.10.0
  • 192.168.10.8
  • 192.168.10.16
  • 192.168.10.12

6. What is the broadcast address for the subnet 10.10.10.0/24?

  • 10.10.10.255
  • 10.10.10.0
  • 10.10.11.255
  • 10.10.10.128

7. How many IP addresses are available in a subnet with a subnet mask of 255.255.255.240?

  • 16
  • 30
  • 32
  • 64

8. Which of the following IP addresses falls within the subnet 192.168.1.0/29?

  • 192.168.1.7
  • 192.168.1.4
  • 192.168.1.8
  • 192.168.1.15

9. What is the valid host range for the subnet 192.168.10.16/29?

  • 192.168.10.17 - 192.168.10.30
  • 192.168.10.17 - 192.168.10.22
  • 192.168.10.16 - 192.168.10.31
  • 192.168.10.18 - 192.168.10.30

10. Which subnet mask would be used for a /30 prefix?

  • 255.255.255.252
  • 255.255.255.255
  • 255.255.255.240
  • 255.255.255.224

11. What is the number of subnets that can be created from a Class B network with a subnet mask of /22?

  • 4
  • 1024
  • 16
  • 64

12. How do you calculate the number of usable hosts in a subnet?

  • Subtract 2 from the total number of IP addresses in the subnet
  • Multiply the total number of IP addresses in the subnet
  • Add 2 to the total number of IP addresses
  • Use the default IP range

13. How many subnets can be created by borrowing 4 bits from the host portion of a Class C IP address?

  • 16
  • 4
  • 8
  • 32

14. What is the subnet mask for a Class B network with a /17 prefix?

  • 255.255.255.255
  • 255.255.128.0
  • 255.255.255.0
  • 255.255.192.0

15. What is the broadcast address for a subnet with the network address 172.16.0.0/19?

  • 172.16.0.255
  • 172.16.31.255
  • 172.16.31.0
  • 172.16.0.31

16. How many bits are used for the network portion in a /22 subnet mask?

  • 22
  • 16
  • 24
  • 8

17. What is the first usable IP address in the subnet 192.168.1.0/29?

  • 192.168.1.1
  • 192.168.1.2
  • 192.168.1.3
  • 192.168.1.5

18. Which subnet mask will create 64 subnets from a Class C network?

  • 255.255.255.128
  • 255.255.255.192
  • 255.255.255.240
  • 255.255.255.248

19. What is the largest number of hosts a subnet with a /30 mask can accommodate?

  • 2
  • 4
  • 8
  • 16

20. Which of the following subnets is created by borrowing 2 bits from the host portion of a Class C network?

  • /30
  • /28
  • /27
  • /26

21. How many bits does a Class C IP address have for host addresses?

  • 8
  • 16
  • 24
  • 32

22. What is the network address of the IP 192.168.2.85 with the subnet mask 255.255.255.128?

  • 192.168.2.0
  • 192.168.2.64
  • 192.168.2.128
  • 192.168.2.192

23. What is the broadcast address for the subnet 192.168.1.0/25?

  • 192.168.1.128
  • 192.168.1.255
  • 192.168.1.0
  • 192.168.1.64

24. How many bits are in the host portion of an IP address with a /23 prefix?

  • 9
  • 16
  • 8
  • 24

25. What is the maximum number of subnets available with a /27 subnet mask in a Class C network?

  • 8
  • 4
  • 16
  • 32

26. What does CIDR stand for?

  • Classful Inter-Domain Routing
  • Classless Inter-Domain Routing
  • Centralized Internet Domain Routing
  • Classless Internet Domain Routing

27. What is the range of IP addresses in the subnet 192.168.5.0/26?

  • 192.168.5.0 - 192.168.5.63
  • 192.168.5.1 - 192.168.5.64
  • 192.168.5.0 - 192.168.5.127
  • 192.168.5.1 - 192.168.5.128

28. What is the subnet mask for a network with 512 subnets?

  • 255.255.255.128
  • 255.255.255.192
  • 255.255.255.240
  • 255.255.255.248

29. How many IP addresses are reserved for the network and broadcast addresses in any subnet?

  • 1
  • 2
  • 3
  • 4

30. What is the maximum number of hosts that can be accommodated by a subnet with a /22 prefix?

  • 1024
  • 510
  • 512
  • 254

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