IP Subnet Sheet

Have you ever wondered what is a /27?  Or how many IP addresses do I get to use with a /28?  Is there a use for a /31?  CIDR Subnet Mask Total IPs Usable IPs /32 255.255.255.255 1 1 /31 255.255.255.254 2 0* /30 255.255.255.252 4...

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