Usable ip addresses in a subnet

- How many usable ip addresses are there in a 20-bit subnet
- How many usable ip addresses are there in a 23-bit subnet
- Usable ip addresses in azure subnet
- Usable ip addresses per subnet
- How many usable host ip addresses are in a /24 subnet
- How many usable host ip addresses are in a /25 subnet
- Subnet mask что это
- Ip calculator
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