Chopping Down

VLSM principles will let you take an network and slice it down in to smaller chunks. Those chunks can then be sliced into smaller chunks and so on. You only reach the limit when you get to the mask 255.255.255.252 or /30 because this
gives you two usable hosts which is the minimum you would need for any network.

Let’s take network 200.100.100.0 /24

You change the mask from /24 to /25 and this happens: