An Example of VLSM

Consider that Mental Merge has been given a Class B address. The company has grown and now has some satellite offices that connect via point-to-point serial lines. The remote offices have eight workstations, three printers, and a router connecting them to the outside world. The main site has a building with ten floors, and each floor has approximately 25 workstations and four printers. A server farm in the basement has three servers and two routers. In this scenario, it is impossible to create a mask that serves all these environments. If you use an older routing protocol, you will waste a considerable amount of the available address space.

VLSM requires a routing protocol that supports the sending of the subnet mask.

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