Sams Teach Yourself TCP/IP in 24 Hours

Hour 5. Subnetting and CIDR

What You’ll Learn in This Hour:

Subnetting

Subnet masks

CIDR notation

 

Subnetting evolved as a means for using IP addressing to break up a physical network into smaller logical entities called subnets. Later developments, such as Classless Inter-Domain Routing (CIDR, discussed at the end of this hour) and IPv6 (see Hour 13, “IPv6: The Next Generation”), have reduced the need for the classical approach to subnetting, ...