Learning how to calculate a subnet

cybervd

New Member
How do I create 4 subnets from the default 172.16.0.0/16 network (I need to use the entire 172.16.0.0/16 block)? I'm honestly not good at math and this looks very confusing to me. Is there anyone who could just explain this to me step by step? Thanx.
 


dos2unix

Active Member
I'm not sure I would say /16 is a "default" :) Usually /24 is the most common.

Here is a link to a CIDR calaculator

A /16 is the same thing as a 0.0.255.255. This will give you over 65,000 subnets.

This closest number that can be divided by 4 is 64. 64 divided by 4 = 16.
So you need 16,000 (16,384) hosts per subnet?
 

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