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