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Question 24 - CCST-Networking discussion

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A host is given the IP address 172.16.100.25 and the subnet mask 255.255.252.0.

What is the CIDR notation for this address?

A.

172.16.100.25 /23

Answers
A.

172.16.100.25 /23

B.

172.16.100.25 /20

Answers
B.

172.16.100.25 /20

C.

172.16.100.25 /21

Answers
C.

172.16.100.25 /21

D.

172.16.100.25 /22

Answers
D.

172.16.100.25 /22

Suggested answer: D

Explanation:

The CIDR (Classless Inter-Domain Routing) notation for the subnet mask 255.255.252.0 is /22. This notation indicates that the first 22 bits of the IP address are used for network identification, and the remaining bits are used for host addresses within the network1.

* Subnet Cheat Sheet -- 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network Reference

=========================

* Subnet Mask to CIDR Notation: The given subnet mask is 255.255.252.0. To convert this to CIDR notation:

* Convert the subnet mask to binary: 11111111.11111111.11111100.00000000

* Count the number of consecutive 1s in the binary form: There are 22 ones.

* Therefore, the CIDR notation is /22.

* Understanding Subnetting and CIDR: Cisco CIDR Guide

asked 11/10/2024
Ann Nacua
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