CCNA 200-301 Portable Command Guide, 5th Edition

Chapter 2. How to Subnet IPv4 Addresses

This chapter provides information concerning the following topics:

• Subnetting a Class C network using binary

• Subnetting a Class B network using binary

• Binary ANDing

  • So Why AND?

  • Shortcuts in binary ANDing

In the previous chapter, we looked at how IPv4 addressing works, and the idea that it is possible to break a single large networks into multiple smaller networks for more flexibility in your network design. This chapter shows you how to perform this task. This is known as subnetting.

Note

Some students (and working IT professionals) are intimidated by subnetting because it deals with math; more specifically, binary math. While some people pick this up quickly, some take more time than others. And ...