5

Applied IPv4 Subnetting

In this chapter, you will learn about the importance of the subnet mask and its role in helping network professionals determine the network and host portions of an address, and helping networking devices make forwarding decisions. Additionally, you will learn how to calculate the network prefix and network ID of IPv4 addresses and use subnetting techniques to create smaller network blocks to improve the efficiency of a network.

In this chapter, we will cover the following topics:

  • Understanding the purpose of the subnet mask
  • Delving into network prefixes and subnet masks
  • Determining the network ID
  • Understanding the purpose of subnetting
  • IPv4 subnetting and VLSM

Let’s dive in!

Understanding the purpose of the subnet ...

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