Which of the following is the subnet mask for a Class C IP address?

The correct answer is D. 255.255.255.0. The default subnet mask for a Class C IP address is 255.255.255.0, which provides 24 network bits and 8 host bits. The other options are either IP addresses or the Class B subnet mask.

Networking

Question

Options

A10.0.0.1
B192.168.1.1
C255.255.0.0
D255.255.255.0

How the community answered

(36 responses)

B
3% (1)
C
6% (2)
D
92% (33)

Why each option

The default subnet mask for a Class C IP address is 255.255.255.0, which provides 24 network bits and 8 host bits. The other options are either IP addresses or the Class B subnet mask.

A10.0.0.1

10.0.0.1 is a Class A private IP address, not a subnet mask.

B192.168.1.1

192.168.1.1 is a Class C private IP address commonly used as a default gateway, not a subnet mask.

C255.255.0.0

255.255.0.0 is the default subnet mask for a Class B address, not Class C.

D255.255.255.0Correct

Class C addresses range from 192.0.0.0 to 223.255.255.255 and use a default subnet mask of 255.255.255.0 (/24), meaning the first three octets identify the network and the last octet identifies individual hosts, supporting up to 254 usable hosts per network.

Concept tested: IPv4 classful addressing and subnet masks

Source: https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/tcpip-addressing-and-subnetting

Topics

#subnet mask#Class C#IP addressing

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