O'Reilly logo

Cisco Networking Essentials by Troy McMillan

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Describing the Components of CIDR

In Chapter 7, you learned that the number of bits in the network portion of the subnet mask determines the number of possible networks, and that the number of host bits determines the number of hosts on those subnets. You also learned the formula to calculate these values given the numbers of bits. However, in classful subnetting, with only the three default subnet masks available, you can calculate those values as many times as you like and you always get the following answers:

images

In this section, you will learn how to create subnet masks that will yield the number of networks you need or the number of hosts you ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required