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Subnetting MCQs

Practice Subnetting MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 4
Computer & Networking BasicsSubnetting

For the network 192.168.10.0/24, the conventional broadcast address is?

  • A192.168.10.0
  • B192.168.10.1
  • C192.168.10.254
  • D192.168.10.255
Report an error
Correct Answer: D. 192.168.10.255
Explanation: With a /24 prefix, the final 8 bits are host bits; setting all of them to 1 gives 192.168.10.255.
Reference: Standard computer networking fundamentals: subnetting
Question 5
Computer & Networking BasicsSubnetting

A /26 IPv4 subnet contains how many total addresses?

  • A32
  • B64
  • C128
  • D256
Report an error
Correct Answer: B. 64
Explanation: A /26 prefix leaves 6 host bits, so the subnet contains 2^6=64 total addresses.
Reference: Standard computer networking fundamentals: subnetting
Question 7
Computer & Networking BasicsSubnetting

The subnet mask corresponding to /26 is?

  • A255.255.255.0
  • B255.255.255.128
  • C255.255.255.192
  • D255.255.255.224
Report an error
Correct Answer: C. 255.255.255.192
Explanation: A /26 mask has 26 leading 1 bits, giving 255.255.255.192.
Reference: Standard computer networking fundamentals: subnetting
Question 8
Computer & Networking BasicsSubnetting

For the subnet 192.168.1.64/26, the broadcast address is?

  • A192.168.1.63
  • B192.168.1.64
  • C192.168.1.126
  • D192.168.1.127
Report an error
Correct Answer: D. 192.168.1.127
Explanation: A /26 block has 64 addresses. The block beginning at .64 ends at .127, which is its broadcast address.
Reference: Standard computer networking fundamentals: subnetting
Question 9
Computer & Networking BasicsSubnetting

For 192.168.1.64/26, the conventional usable host range is?

  • A192.168.1.64 to 192.168.1.127
  • B192.168.1.65 to 192.168.1.126
  • C192.168.1.1 to 192.168.1.62
  • D192.168.1.128 to 192.168.1.191
Report an error
Correct Answer: B. 192.168.1.65 to 192.168.1.126
Explanation: The network address is .64 and broadcast is .127, leaving .65 through .126 for conventional host assignment.
Reference: Standard computer networking fundamentals: subnetting