Network bandwidth represents the capacity of the network connection, though it's important to understand the distinction between theoretical throughput and real-world results when figuring out the right bandwidth formula for your network. Bandwidth is usually expressed in terms of bits per second or, sometimes, in bytes per second. Data coming into the network is known as ingress traffic, and data leaving the network is called egress traffic. It represents both volume and time, representing the amount of data that can be transmitted between two points in a set period of time.

The term bandwidth refers to the data rate supported by the network connection or the interfaces that connect to the network.

Wondering how to calculate bandwidth requirements when designing the network? What specific considerations apply? The answers to these important questions follow.

Unlike a server, which can be configured and reconfigured throughout the life of the network, bandwidth is a network design element usually optimized by figuring out the correct formula for your network from the outset.

As most network administrators can attest, bandwidth is one of the more important factors in the design and maintenance of a functional LAN, WAN or wireless network.

Network bandwidth tools