IP Subnet Masks

So IP subnet masks can be a bit tricky. Some IP’s are usable, some are not, and /24¬† is a different number than how many IP’s are available or even used. What I mean is for 100 IP’s why not go /100 seams easy enough lol. Well Computer programmers are infamous for making things harder than they need to be. I guess¬† to scare off the easily timid. Luckily I found this really simple chart listing the translation for all the common Subnet masks.

Net bitsSubnet masktotal-addresses per subnet