SubNetting : FLSM(Fixed-length subnet mask) and VLSM(Variable-Length Subnet Masking )

Subnetting is the practice of dividing a network into two or more smaller networks. It increases routing efficiency, enhances the security of the network and reduces the size of the broadcast domain.

1.Fixed-Length Subnet Masking:


A fixed-length subnet mask (FLSM) is a sequence of numbers of unchanging length that streamlines packet routing within the subnets of a proprietary network.



FLSM Static Routing:



2.Variable-Length Subnet Masking:


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



VLSM Static Routing: