What is bandwidth?

In computer networks, bandwidth is often used as a synonym for data transfer rate - the amount of data that can be made from one point to another within a given period of time (usually one second). This kind of traffic is usually expressed in bits (of data) per second (bps). Sometimes, this is expressed in bytes per second (Bps). Modem that works at-57600 bps hastwice speed modem that works at 28800 bps. Overall, the link with high traffic is one that may be able to carry enough information to resist the succession of images in a video presentation.

It must be remembered that real communication path usually consists of a succession of links, each with its own bandwidth. If one of these is much slower than others, says it is bandwidth bottleneck.

In electronic communications, bandwidth is the width of the range (or band) of frequencies, which uses an electronic signal for a transmission medium. In this use, which requires quick expressed regarding the difference between the frequency signal component and the lowest frequency of the signal-component? Since the frequency signal is measured in Hertz (cycles of a number of changes per second) set bandwidth in Hertz is the difference between the highest frequency signal and use the lowest rate it uses. Typically the voice signal is a band of around three kilohertz (3 kHz); an analog television (TV) broadcast video signal has a band of six megahertz (6 MHz) - about 2000 times as large as the voice signal.