IPv4 Private Address Space

[José Queiroz]

Em ter., 11 de mai. de 2021 às 19:04, Louis Garcia <louisgtwo at gmail.com>
escreveu:

>
> Currently I have three networks 172.16.2.0/24 172.16.3.0/24
> 172.16.4.0/24. I read that not all of 172.16.0.0 is private, only
> 172.16.0.0/12. I am trying to not have public routable IPs on my
> network. Please let me know if this setup is fine.
>

172.16.0.0 *is all private*.

As so is 172.17. 172.18 ando so on, until 172.31.0.0. In fact, the reserved
address space starts on 172.16.0.1 and goes all the way through
172.31.255.254. This is what the "/12" prefix means. Note that bigger
networks use smaller prefixes, and smaller networks use bigger prefixes.

Your networks 172.16.2.0/24, 172.16.3.0/24 and 172.16.4.0/24 are a tiny
portion of the original network. In fact, you could easily use the
"255.255.248.0" (/21) netmask to describe them.
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