 - 1) In computer networks, bandwidth is often used as a synonym for data transfer rate - the amount of data that can be carried from one point to another in a given time period (usually a second). This kind of bandwidth is usually expressed in bits (of data) per second (bps). Occasionally, it's expressed as bytes per second (Bps). A modem that works at 57,600 bps hastwice the bandwidth of a modem that works at 28,800 bps. In general, a link with a high bandwidth is one that may be able to carry enough information to sustain the succession of images in a video presentation. It should be remembered that a real communications path usually consists of a succession of links, each with its own bandwidth. If one of these is much slower than the rest, it is said to be a bandwidth bottleneck.
2) In electronic communication, bandwidth is the width of the range (or band) of frequencies that an electronic signal uses on a given transmission medium. In this usage, bandwidth is expressed in terms of the difference between the highest-frequency signal component and the lowest-frequency signal component. Since the frequency of a signal is measured in hertz (the number of cycles of change per second), a given bandwidth is the difference in hertz between the highest frequency the signal uses and the lowest frequency it uses. A typical voice signal has a bandwidth of approximately three kilohertz (3 kHz); an analog television (TV) broadcast video signal has a bandwidth of six megahertz (6 MHz) -- some 2,000 times as wide as the voice signal.
 |
Getting started with bandwidth |
| To explore how bandwidth is used in the enterprise, here is an additional resource: |
| Bandwidth management: Learn when it's necessary to purchase more bandwidth, what you should know about network topology and how to implement bandwidth management projects. |
| LAST UPDATED: |
30 Sep 2008
|
 |
Read more about bandwidth:
|
|
Do you have something to add to this definition? Let us know.
Send your comments to techterms@whatis.com
|
 |
 |
| |
RELATED GLOSSARY TERMS
| Terms from Whatis.com − the technology online dictionary |
 |
availability
(SearchNetworking.com)
1) In a telephone circuit, availability is the ratio between the time during which the circuit is operational and elapsed time.
2) In a network...
|
|
carrier detect
(SearchNetworking.com)
|
|
|
