Why You Should Subnet

It is not as complicated of a concept as it sounds, and yes we are talking about subnetting your network. The word subnet usually draws a cold chill with network administrators who dread tackling the issues at their workplace if they haven’t already.

So why should you subnet? While many admins feel that using separate IP addresses is enough, they run into trouble when they want an IP address in New York to talk to an IP address in Denmark or vice versa. Subnetting is used for internal networks to expand your range when it comes to IP addresses. The outside world is a different story. Instead using a routing table to limit memory usage and pass packets on the correct path.

Routing tables in networks gives the routers all the data they need to route packets from point A to point B. Legacy systems used subnet “classes” and is slowly being migrated out in favor of a diversified VLAN plan. You had Class A, Class B, and Class C subnets in the network.

In the early days of the Internet this type of subnet masks worked fine because there was no huge demand place on IP addresses. Their were plenty of IP’s to go around. Not it is a different story with the explosive boom of smartphones connected online along with more people than ever accessing the Internet with new computers, tablets, microwaves, cars, and anything else companies are deciding should be connected to the World Wide Web.

This is why you should subnet, for diversification and expandability. Yes, it does offer security and performance gains by segmenting your network, but you really want to subnet to give you the ability to accommodate your growing list of employees, students, clients, customers, or whomever your network will serve.