Supernetting and Classless Addressing

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Supernetting

Classes A and B are almost depleted.
Class C addresses are still available.

What if a company needs a network larger than 254 hosts?

! Give the company several consecutive blocks
of C addresses and treat these as a single supernetwork


Rules:

The number of blocks must be a power of 2

The blocks must be contiguous in the address
space (no gaps between the blocks).

The third byte of the first address in the
superblock must be evenly divisible by the
number of blocks.