IP Addressing and Subnetting

For some reason, nothing seems to scare people preparing for the CCNA or CCDA quite as much as subnetting. While I’m not quite sure why this fear exists, I can tell you one thing for certain – subnetting isn’t very difficult at all, as long as you can remember a few simple rules. If you follow along closely, by the end of this chapter you too will realize how easy subnetting can be.

While subnetting is certainly important, there are many IP addressing concepts that you’ll need to understand in order to be successful in passing your CCNA and CCDA exams. Topics that we’ll cover in this chapter include:

  • Binary-decimal conversions
  • Determining classes of addresses
  • Private IP address ranges
  • Defining custom subnet masks and address ranges
  • Classless addressing
  • Classless Inter-Domain Routing (CIDR)

In your new life as a network engineer, these concepts will represent the foundation of your knowledge. Take the time to truly understand them, as you will ultimately use them again and again.

Author: Dan DiNicolo

Dan DiNicolo is a freelance author, consultant, trainer, and the managing editor of 2000Trainers.com. He is the author of the CCNA Study Guide found on this site, as well as many books including the PC Magazine titles Windows XP Security Solutions and Windows Vista Security Solutions. Click here to contact Dan.