16 VLSM from a host IP Address (the easiest way for understanding)_VLSM in Bangla by Jahangir
Variable-Length Subnet Masking (VLSM) amounts to “subnetting subnets,” which means that VLSM allows network engineers to divide an IP address space into a hierarchy of subnets of different sizes, making it possible to create subnets with very different host counts without wasting large numbers of addresses.
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