When measuring communication lines, there are four major parameters that we should be aware of: bandwidth, delay, jitter, and packet loss. While there are applications that require high bandwidth, there are other applications that are more sensitive to delay and jitter. Packet loss can influence all types of applications, but there are applications that are more sensitive to it and some that are less.

In this chapter we will learn how to measure these parameters, how to check for network problems caused by it, and how to solve them when possible.