MCQs

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1. What is the default subnet mask for a Class A IP address?
   a. 255.0.0.0
   b. 255.255.0.0
   c. 255.255.255.0
   d. 0.0.0.0
   Answer: a. 255.0.0.0nitizsharma+1
2. What is the default subnet mask for a Class B IP address?
   a. 255.0.0.0
   b. 255.255.0.0
   c. 255.255.255.0
   d. 255.255.255.255
   Answer: b. 255.255.0.0sanfoundry+1
3. What is the default subnet mask for a Class C IP address?
   a. 255.0.0.0
   b. 255.255.0.0
   c. 255.255.255.0
   d. 255.255.255.255
   Answer: c. 255.255.255.0mastguru+1
4. Which subnet mask allows for 4 subnets within a Class C network?
   a. 255.255.255.0
   b. 255.255.255.192
   c. 255.255.255.224
   d. 255.255.255.240
   Answer: b. 255.255.255.192grabstudy+1
5. How many hosts are available in a subnet with the mask 255.255.255.224?
   a. 32
   b. 30
   c. 28
   d. 62
   Answer: b. 30nitizsharma+1
6. What is the subnet mask for creating 8 subnets in a Class C network?
   a. 255.255.255.224
   b. 255.255.255.240
   c. 255.255.255.255
   d. 255.255.255.248
   Answer: d. 255.255.255.248scribd+1
7. What is the broadcast address for network 192.168.10.0/24?
   a. 192.168.10.1
   b. 192.168.10.255
   c. 192.168.10.254
   d. 192.168.255.255
   Answer: b. 192.168.10.255nitizsharma
8. What is the subnet mask for dividing a Class B network into 64 subnets?
   a. 255.255.255.0
   b. 255.255.252.0
   c. 255.255.255.255
   d. 255.255.255.192
   Answer: a. 255.255.255.0nitizsharma
9. How many valid hosts are in a subnet with 255.255.255.240?
   a. 14
   b. 28
   c. 30
   d. 50
   Answer: a. 14ccnatutorials+1
10. If a network uses the subnet mask 255.255.255.128, how many hosts are available per subnet?
    a. 128
    b. 126
    c. 256
    d. 254
    Answer: b. 126ccnatutorials+1
11. Which subnet mask will allow approximately 500 hosts per subnet?
    a. 255.255.255.0
    b. 255.255.254.0
    c. 255.255.255.128
    d. 255.255.255.240
    Answer: b. 255.255.254.0nitizsharma
12. What is the network address for IP 192.168.1.66/27?
    a. 192.168.1.0
    b. 192.168.1.32
    c. 192.168.1.64
    d. 192.168.1.128
    Answer: c. 192.168.1.64nitizsharma
13. Which mask supplies 6 subnets in Class C?
    a. 255.255.255.252
    b. 255.255.255.224
    c. 255.255.255.192
    d. 255.255.255.240
    Answer: c. 255.255.255.192ccnatutorials
14. What is the valid host range for the subnet 10.10.10.16/28?
    a. 10.10.10.17–10.10.10.30
    b. 10.10.10.16–10.10.10.31
    c. 10.10.10.1–10.10.10.14
    d. 10.10.10.33–10.10.10.47
    Answer: a. 10.10.10.17–10.10.10.30nitizsharma
15. Which mask corresponds to prefix length 26?
    a. 255.255.255.224
    b. 255.255.255.240
    c. 255.255.255.192
    d. 255.255.255.128
    Answer: c. 255.255.255.192ccnatutorials
16. What is the maximum number of hosts in a subnet with mask 255.255.255.0?
    a. 254
    b. 255
    c. 256
    d. 253
    Answer: a. 254grabstudy+1
17. For which subnet mask does each subnet contain 4 valid hosts?
    a. 255.255.255.240
    b. 255.255.255.224
    c. 255.255.255.248
    d. 255.255.255.252
    Answer: d. 255.255.255.252nitizsharma
18. How many bits does the subnet mask 255.255.255.224 have?
    a. 27
    b. 28
    c. 29
    d. 26
    Answer: a. 27ccnatutorials+1
19. Which mask allows 256 subnets in a Class B network?
    a. 255.255.255.252
    b. 255.255.255.0
    c. 255.255.255.128
    d. 255.255.254.0
    Answer: b. 255.255.255.0nitizsharma
20. What is the broadcast address for 192.168.72.64/26?
    a. 192.168.72.127
    b. 192.168.72.64
    c. 192.168.72.191
    d. 192.168.72.255
    Answer: a. 192.168.72.127nitizsharma
21. What is the usable host range for subnet 192.168.187.233/27?
    a. 192.168.187.225–192.168.187.254
    b. 192.168.187.224–192.168.187.255
    c. 192.168.187.226–192.168.187.253
    d. 192.168.187.220–192.168.187.245
    Answer: a. 192.168.187.225–192.168.187.254nitizsharma
22. What mask would you use for 16 subnetworks in a Class C network?
    a. 255.255.255.252
    b. 255.255.255.224
    c. 255.255.255.240
    d. 255.255.255.255
    Answer: c. 255.255.255.240sanfoundry
23. What is the subnet address of 172.16.13.5/25?
    a. 172.16.13.0
    b. 172.16.13.128
    c. 172.16.0.0
    d. 172.16.13.255
    Answer: a. 172.16.13.0sanfoundry
24. Subnet mask 255.255.255.248 provides how many usable hosts?
    a. 4
    b. 6
    c. 8
    d. 14
    Answer: b. 6ccnatutorials+1
25. What is the subnet mask for 32 subnets in a Class B network?
    a. 255.255.255.0
    b. 255.255.255.240
    c. 255.255.254.0
    d. 255.255.255.128
    Answer: d. 255.255.255.128ccnatutorials+1
26. Which mask would you use for 1000 hosts per subnet?
    a. 255.255.254.0
    b. 255.255.255.0
    c. 255.255.255.128
    d. 255.255.248.0
    Answer: a. 255.255.254.0nitizsharma
27. How many subnets can you get using 255.255.255.224 in Class C?
    a. 8
    b. 4
    c. 6
    d. 16
    Answer: a. 8ccnatutorials+1
28. What is the subnet mask if you want 64 hosts per subnet?
    a. 255.255.255.192
    b. 255.255.255.128
    c. 255.255.255.224
    d. 255.255.255.240
    Answer: b. 255.255.255.128nitizsharma
29. What is the last valid host in subnet 172.16.22.0/24?
    a. 172.16.22.1
    b. 172.16.22.254
    c. 172.16.22.255
    d. 172.16.22.253
    Answer: b. 172.16.22.254nitizsharma
30. What is the block size for a /28 subnet?
    a. 4
    b. 8
    c. 16
    d. 32
    Answer: c. 16ccnatutorials
31. Which mask provides only 2 hosts per subnet?
    a. 255.255.255.252
    b. 255.255.255.248
    c. 255.255.255.240
    d. 255.255.255.192
    Answer: a. 255.255.255.252subnetting+1
32. What is the first valid host in subnet 172.20.225.111/25?
    a. 172.20.225.1
    b. 172.20.225.0
    c. 172.20.225.128
    d. 172.20.225.64
    Answer: a. 172.20.225.1nitizsharma
33. What is the range of hosts in 172.16.64.0/21?
    a. 172.16.64.1–172.16.71.254
    b. 172.16.64.0–172.16.71.255
    c. 172.16.65.0–172.16.71.255
    d. 172.16.64.10–172.16.70.255
    Answer: a. 172.16.64.1–172.16.71.254nitizsharma
34. Which mask allows 128 subnets in a /20 network?
    a. 255.255.255.240
    b. 255.255.240.0
    c. 255.255.255.224
    d. 255.255.255.192
    Answer: b. 255.255.240.0nitizsharma
35. What is the network address for 172.16.66.0/21?
    a. 172.16.64.0
    b. 172.16.66.0
    c. 172.16.68.0
    d. 172.16.70.0
    Answer: a. 172.16.64.0nitizsharma
36. What is the broadcast address for 172.18.105.64/27?
    a. 172.18.105.95
    b. 172.18.105.255
    c. 172.18.105.127
    d. 172.18.105.64
    Answer: a. 172.18.105.95nitizsharma
37. For a network 172.21.0.0 requiring 100 subnets, which mask should be used if each subnet needs up to 400 hosts?
    a. 255.255.254.0
    b. 255.255.255.0
    c. 255.255.255.128
    d. 255.255.255.240
    Answer: a. 255.255.254.0nitizsharma
38. What is the first valid host in 172.19.16.0/20?
    a. 172.19.16.1
    b. 172.19.16.0
    c. 172.19.16.2
    d. 172.19.16.15
    Answer: a. 172.19.16.1nitizsharma
39. What is the valid host range for 192.168.1.32/27?
    a. 192.168.1.33–192.168.1.62
    b. 192.168.1.32–192.168.1.63
    c. 192.168.1.33–192.168.1.63
    d. 192.168.1.34–192.168.1.63
    Answer: a. 192.168.1.33–192.168.1.62ccnatutorials+1
40. What is the subnet mask for 172.16.0.0 network to achieve 80 subnets with 300 hosts each?
    a. 255.255.255.0
    b. 255.255.254.0
    c. 255.255.252.0
    d. 255.255.255.128
    Answer: b. 255.255.254.0nitizsharma
41. What is the range of usable hosts in subnet 192.168.212.0/30?
    a. 192.168.212.1–192.168.212.2
    b. 192.168.212.0–192.168.212.3
    c. 192.168.212.2–192.168.212.3
    d. 192.168.212.1–192.168.212.3
    Answer: a. 192.168.212.1–192.168.212.2subnetting+1
42. What is the broadcast address for subnet 172.29.144.0/20?
    a. 172.29.159.254
    b. 172.29.144.254
    c. 172.29.144.255
    d. 172.29.159.255
    Answer: a. 172.29.159.254nitizsharma
43. How many usable hosts do you get in a /28 subnet?
    a. 14
    b. 16
    c. 12
    d. 30
    Answer: a. 14ccnatutorials+1
44. What is the last valid host on the subnetwork 172.22.94.144/28?
    a. 172.22.94.158
    b. 172.22.94.155
    c. 172.22.94.144
    d. 172.22.94.159
    Answer: a. 172.22.94.158nitizsharma
45. Which mask is required to make 32 subnets from 192.168.100.0 network?
    a. 255.255.255.224
    b. 255.255.255.240
    c. 255.255.255.248
    d. 255.255.255.252
    Answer: a. 255.255.255.224nitizsharma
46. How many subnets can you create from a /27 mask in Class C?
    a. 8
    b. 16
    c. 32
    d. 4
    Answer: b. 16ccnatutorials
47. Which mask is most suitable for a subnet that needs only 4 IPs?
    a. 255.255.255.252
    b. 255.255.255.248
    c. 255.255.255.240
    d. 255.255.255.224
    Answer: a. 255.255.255.252subnetting
48. What is the broadcast address for the subnet 192.168.100.16/28?
    a. 192.168.100.31
    b. 192.168.100.15
    c. 192.168.100.30
    d. 192.168.100.16
    Answer: a. 192.168.100.31nitizsharma
49. What is the maximum number of hosts in 255.255.255.255 mask?
    a. 0
    b. 1
    c. 2
    d. 254
    Answer: a. 0subnetting
50. What is the block size of subnet for 255.255.255.224?
    a. 32
    b. 16
    c. 28
    d. 8
    Answer: a. 32ccnatutorials+1

1. https://nitizsharma.com/questions-and-answers-for-subnetting/
2. https://www.mastguru.com/subnetting-questions-answers/question/136
3. https://www.sanfoundry.com/computer-networks-questions-answers-analyzing-subnet-mask/
4. https://www.grabstudy.com/Technical-MCQs/Subnetting.php
5. https://www.scribd.com/document/859365488/Subnetting-MCQs
6. https://ccnatutorials.in/multiple-choice-questions/mcq-for-subnetting-set-3/
7. https://www.subnetting.net/Subnetting.aspx?mode=practice
8. https://www.examveda.com/networking/practice-mcq-question-on-subnetting/
9. https://ipcisco.com/subnetting-quiz-1-n485hju/
10. https://testbook.com/objective-questions/mcq-on-ipv4–5eea6a0939140f30f369d912
11. https://www.sanfoundry.com/network-security-questions-answers-designing-subnets-i/
12. https://www.youtube.com/watch?v=X2_zt0pyqkQ
13. https://www.indiabix.com/networking/subnetting/
14. https://www.nandantechnicals.com/2021/12/MCQ%20on%20Subnetting.html
15. https://www.youtube.com/watch?v=ERP271Izjo0
16. https://www.scribd.com/document/559862743/mcq-inter