57.16 IP Addresses CIDR Notation

The classless inter-domain routing notation (CIDR) allows IP address ranges to be specified. For example, the address refers to that exact IP address whereas refers to the IP addresses and The number of addresses is calculated as \(2^{32-n}\) where \(n\) in the above two examples is 32 and 31 respectively. That is, 1 (\(2^0\)) and 2 (\(2^1\)).

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