Subnet Cheat Sheet – 24 Subnet Mask, 30, 26, 27, 29, and …
For instance, the /24 in 192.168.0.101/24 is equivalent to the IP address 192.168.0.101 and the subnet mask 255.255.255.0. How to Calculate CIDR Noation To figure out the CIDR notation for a given subnet mask, all you need to do is convert the subnet mask into binary, then count the number of ones or "on" digits.
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