What is a Subnet Mask?

What is a Subnet Mask?


< A Subnet or subnetworkmask is a 32-bit number that masks an IP address, and divides the IP address into network address and host address. Subnet Mask is made by setting network bits to all "1"s and setting host bits to all "0"s. Within a given network, two host addresses are reserved for special purpose, and cannot be assigned to hosts.

Subnet Mask Example

The “0” address is assigned a network address and “255” is assigned to a broadcast address, and they cannot be assigned to hosts.


What is a Subnet Mask?



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