Which network is using a subnet mask of 255.255.255.192?

The correct answer is A. 192.10.100.0/26. This question requires identifying the CIDR notation that corresponds to the subnet mask 255.255.255.192.

Submitted by marco_it· Apr 18, 2026Network Security

Question

Options

A192.10.100.0/26
B172.16.72.0/29
C172.168.5.0/27
D192.168.100.0/24

How the community answered

(52 responses)

A
87% (45)
B
2% (1)
C
8% (4)
D
4% (2)

Why each option

This question requires identifying the CIDR notation that corresponds to the subnet mask 255.255.255.192.

A192.10.100.0/26Correct

A subnet mask of 255.255.255.192 signifies 26 network bits in CIDR notation (/26). The first three octets (255.255.255) account for 24 bits, and 192 in the fourth octet (11000000 in binary) adds 2 more network bits, totaling 26.

B172.16.72.0/29

A /29 subnet mask corresponds to 255.255.255.248, not 255.255.255.192.

C172.168.5.0/27

A /27 subnet mask corresponds to 255.255.255.224, not 255.255.255.192.

D192.168.100.0/24

A /24 subnet mask corresponds to 255.255.255.0, not 255.255.255.192.

Concept tested: CIDR notation and subnet mask conversion

Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/ip-addressing/ipv4-subnet-extensions

Topics

#Subnetting#CIDR#IP Addressing#Network Masks

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