Cisco Networking Essentials

Understanding the Benefits of Subnetting

Although certainly benefits have been derived on the Internet from CIDR and subnetting, there are solid reasons to deploy subnetting and CIDR in the design of LANs as well. When it is included in network design, subnetting can improve both performance and security. This section covers the problems presented by network congestion and the benefits possible with subnetting. The ways that network segmentation at the Internet layer can enhance security are also discussed.

Identifying Sources of Network Congestion

Network congestion occurs when the amount of traffic in the network exceeds the abilities of the physical infrastructure. In the same way that too many cars on a highway slow traffic to a crawl, too ...