BANDWIDTH
In computing, bandwidth is the bit-rate of available or
consumed information capacity expressed typically in metric multiples of
bits per second. Variously, bandwidth may be characterized as network bandwidth, data bandwidth, or digital bandwidth.
The term bandwidth sometimes defines the net bit rate (aka. peak bit rate, information rate, or physical layer useful bit rate), channel capacity, or the maximum throughput of a logical or physical communication path in a digital communication system. For example, bandwidth tests measure the maximum throughput of a computer network. The maximum rate that can be sustained on a link are limited by the Shannon-Hartley channel capacity for these communication systems, which is dependent on the bandwidth in hertz and the noise on the channel.
Bandwidth in bit/s may also refer to consumed bandwidth, corresponding to achieved throughput or goodput, i.e., the average rate of successful data transfer through a communication path. This sense applies to concepts and technologies such as bandwidth shaping, bandwidth management, bandwidth throttling, bandwidth cap, bandwidth allocation (for example bandwidth allocation protocol and dynamic bandwidth allocation), etc. A bit stream's bandwidth is proportional to the average consumed signal bandwidth in Hertz (the average spectral bandwidth of the analog signal representing the bit stream) during a studied time interval.
Channel bandwidth may be confused with useful data throughput (or goodput). For example, a channel with x bps may not necessarily transmit data at x rate, since protocols, encryption, and other factors can add appreciable overhead. For instance, much internet traffic uses the transmission control protocol (TCP), which requires a three-way handshake for each transaction. Although in many modern implementations the protocol is efficient, it does add significant overhead compared to simpler protocols. Also, data packets may be lost, which further reduces the useful data throughput. In general, for any effective digital communication, a framing protocol is needed; overhead and effective throughput depends on implementation. Useful throughput is less than or equal to the actual channel capacity plus implementation overhead.
Asymptotic bandwidths are usually estimated by sending a number of very large messages through the network, measuring the end-to-end throughput. As other bandwidths, the asymptotic bandwidth is measured in multiples of bits per seconds.
In Web hosting service, the term bandwidth is often incorrectly used to describe the amount of data transferred to or from the website or server within a prescribed period of time, for example bandwidth consumption accumulated over a month measured in gigabytes per month. The more accurate phrase used for this meaning of a maximum amount of data transfer each month or given period is monthly data transfer.
This article is about the concept in computing and networking. For use in signal and wireless communications, see Bandwidth (signal processing). For other uses, see Bandwidth (disambiguation).
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
band·width (bănd′wÄdth′, -wÄth′)n.1. The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.2. The amount of data that can be passed along a communications channel in a given period of time.bandwidth (ˈbændËŒwɪdθ) n1. (Electronics) the range of frequencies within a given waveband used for a particular transmission2. (Electronics) the range of frequencies over which a receiver or amplifier should not differ by more than a specified amount3. (Telecommunications) the range of frequencies used in a specific telecommunications signalband•width (ˈbændËŒwɪdθ, -ËŒwɪtθ) n. the smallest range of electronic frequencies constituting a band, within which a particular signal can be transmitted without distortion. the transmission capacity of an electronic communications device. bandwidthThe difference between the limiting frequencies of a continuous frequency band expressed in hertz (cycles per second). The term bandwidth is also loosely used to refer to the rate at which data can be transmitted over a given communications circuit. In the latter usage, bandwidth is usually expressed in either kilobits per second or megabits per second. ThesaurusAntonymsRelated WordsSynonymsLegend:Switch to new thesaurus Noun1.bandwidth - a data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channelinformation measure - a system of measurement of information based on the probabilities of the events that convey information TranslationsBandbreitekaistakaistanleveyssiirtonopeusdébitsávszélességbandwidth n → largeur f de bande.
band·width (bănd′wÄdth′, -wÄth′)n.1. The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.2. The amount of data that can be passed along a communications channel in a given period of time.bandwidth (ˈbændËŒwɪdθ) n1. (Electronics) the range of frequencies within a given waveband used for a particular transmission2. (Electronics) the range of frequencies over which a receiver or amplifier should not differ by more than a specified amount3. (Telecommunications) the range of frequencies used in a specific telecommunications signalband•width (ˈbændËŒwɪdθ, -ËŒwɪtθ) n. the smallest range of electronic frequencies constituting a band, within which a particular signal can be transmitted without distortion. the transmission capacity of an electronic communications device. bandwidthThe difference between the limiting frequencies of a continuous frequency band expressed in hertz (cycles per second). The term bandwidth is also loosely used to refer to the rate at which data can be transmitted over a given communications circuit. In the latter usage, bandwidth is usually expressed in either kilobits per second or megabits per second.
The term bandwidth sometimes defines the net bit rate (aka. peak bit rate, information rate, or physical layer useful bit rate), channel capacity, or the maximum throughput of a logical or physical communication path in a digital communication system. For example, bandwidth tests measure the maximum throughput of a computer network. The maximum rate that can be sustained on a link are limited by the Shannon-Hartley channel capacity for these communication systems, which is dependent on the bandwidth in hertz and the noise on the channel.
Bandwidth in bit/s may also refer to consumed bandwidth, corresponding to achieved throughput or goodput, i.e., the average rate of successful data transfer through a communication path. This sense applies to concepts and technologies such as bandwidth shaping, bandwidth management, bandwidth throttling, bandwidth cap, bandwidth allocation (for example bandwidth allocation protocol and dynamic bandwidth allocation), etc. A bit stream's bandwidth is proportional to the average consumed signal bandwidth in Hertz (the average spectral bandwidth of the analog signal representing the bit stream) during a studied time interval.
Channel bandwidth may be confused with useful data throughput (or goodput). For example, a channel with x bps may not necessarily transmit data at x rate, since protocols, encryption, and other factors can add appreciable overhead. For instance, much internet traffic uses the transmission control protocol (TCP), which requires a three-way handshake for each transaction. Although in many modern implementations the protocol is efficient, it does add significant overhead compared to simpler protocols. Also, data packets may be lost, which further reduces the useful data throughput. In general, for any effective digital communication, a framing protocol is needed; overhead and effective throughput depends on implementation. Useful throughput is less than or equal to the actual channel capacity plus implementation overhead.
Asymptotic bandwidths are usually estimated by sending a number of very large messages through the network, measuring the end-to-end throughput. As other bandwidths, the asymptotic bandwidth is measured in multiples of bits per seconds.
In Web hosting service, the term bandwidth is often incorrectly used to describe the amount of data transferred to or from the website or server within a prescribed period of time, for example bandwidth consumption accumulated over a month measured in gigabytes per month. The more accurate phrase used for this meaning of a maximum amount of data transfer each month or given period is monthly data transfer.
This article is about the concept in computing and networking. For use in signal and wireless communications, see Bandwidth (signal processing). For other uses, see Bandwidth (disambiguation).
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
band·width (bănd′wÄdth′, -wÄth′)n.1. The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.2. The amount of data that can be passed along a communications channel in a given period of time.bandwidth (ˈbændËŒwɪdθ) n1. (Electronics) the range of frequencies within a given waveband used for a particular transmission2. (Electronics) the range of frequencies over which a receiver or amplifier should not differ by more than a specified amount3. (Telecommunications) the range of frequencies used in a specific telecommunications signalband•width (ˈbændËŒwɪdθ, -ËŒwɪtθ) n. the smallest range of electronic frequencies constituting a band, within which a particular signal can be transmitted without distortion. the transmission capacity of an electronic communications device. bandwidthThe difference between the limiting frequencies of a continuous frequency band expressed in hertz (cycles per second). The term bandwidth is also loosely used to refer to the rate at which data can be transmitted over a given communications circuit. In the latter usage, bandwidth is usually expressed in either kilobits per second or megabits per second. ThesaurusAntonymsRelated WordsSynonymsLegend:Switch to new thesaurus Noun1.bandwidth - a data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channelinformation measure - a system of measurement of information based on the probabilities of the events that convey information TranslationsBandbreitekaistakaistanleveyssiirtonopeusdébitsávszélességbandwidth n → largeur f de bande.
band·width (bănd′wÄdth′, -wÄth′)n.1. The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.2. The amount of data that can be passed along a communications channel in a given period of time.bandwidth (ˈbændËŒwɪdθ) n1. (Electronics) the range of frequencies within a given waveband used for a particular transmission2. (Electronics) the range of frequencies over which a receiver or amplifier should not differ by more than a specified amount3. (Telecommunications) the range of frequencies used in a specific telecommunications signalband•width (ˈbændËŒwɪdθ, -ËŒwɪtθ) n. the smallest range of electronic frequencies constituting a band, within which a particular signal can be transmitted without distortion. the transmission capacity of an electronic communications device. bandwidthThe difference between the limiting frequencies of a continuous frequency band expressed in hertz (cycles per second). The term bandwidth is also loosely used to refer to the rate at which data can be transmitted over a given communications circuit. In the latter usage, bandwidth is usually expressed in either kilobits per second or megabits per second.
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