CHAPTER

5

Subnetting and VLSM

In this chapter, you will

•   Learn about subnetting networks

•   Learn some subnetting shortcuts

•   Understand the difference between classful and classless addressing

•   Learn about Variable Length Subnet Masks (VLSMs)

In Chapter 4 you learned the basics of TCP/IP addressing. In this chapter, you’ll learn how to divide one network address range into multiple network ranges, or subnets, so that you can assign each address range to a separate network (subnet) in your internetwork (network made up of multiple networks).

You may need to use multiple networks as a result of your business operating in several different physical locations, for example. Or, if you’re working in one location, you may want to cut ...

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