What is a Variable Length Subnet Mask (VLSM)? Variable Length Subnet Mask (VLSM) is a subnet-- a segmented piece of a larger network -- design strategy where all subnet masks can have varying sizes.
A subnet mask is a number that specifies which parts of an IP address represent the host and network portions of the address. These masks are 32 bits in IPv4 networks and 128 bits in IPv6 networks. A ...
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