Finding netid in CIDR

Question

I am practicing questions related to CIDR and I have come across a particular question which I need some explanation. Can somebody please explain in detail how to answer this question.

An address space, allocated to a site via CIDR, extends from 110.45.232.0 to 110.45.233.255. What is the netid of the site network indicated by the prefix?

[A] 110.45.232.0/21
[B] 110.45.232.0/23
[C] 110.45.2320/24
[D] 110.45.233.0/24

Look for the common prefix length of all those addresses in binary. — Piotr P. Karwasz, Nov 24 '19 at 12:37
[This two-part answer](https://networkengineering.stackexchange.com/a/53994/8499) explains all about IPv4 addressing and subnetting. — Ron Maupin, Nov 25 '19 at 03:11

Manikandan Ram · Answer 1 · 2019-11-24T16:36:25.850

1

For your address

You can have 512 address in your subnet..
Your address ranging from 110.45.232.0 to 110.45.233.255
Your subnet mask will be 255.255.254.0

Answer is 110.45.232.0/23 (C)

Always find the IP Address range,

Check for its classes..

Convert the subnet mask into binaries

edited Nov 24 '19 at 16:36

answered Nov 24 '19 at 16:26

Manikandan Ram

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Finding netid in CIDR

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