QoS

The abbreviation QOS could refer to one of several things:Quality of service (QoS), a measure of the reliability of a computer network or telephone serviceQuarterdeck Office Systems, a software company that is now part of SymantecQueen of the South F.C., a Scottish football clubQueensland Ornithological Society, a state birding organisation in AustraliaQuality Operating System, a method of displaying a manufacturing or service unit's quality information in a graphical format.
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In the fields of packet-switched networks and computer networking, the traffic engineering term Quality of Service, abbreviated QoS, refers to resource reservation control mechanisms. Quality of Service can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the application program or the internet service provider policy. Quality of Service guarantees are important if the network capacity is limited, for example in cellular data communication, especially for real-time streaming multimedia applications, for example voice over IP and IP-TV, since these often require fixed bit rate and are delay sensitive.
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Abbreviation for quality of service.

1. The performance specification of a communications channel or system. (188 ) Note: QOS may be quantitatively indicated by channel or system performance parameters, such as signal-to-noise ratio (S/N), bit error ratio (BER), message throughput rate, and call blocking probability. 2. A subjective rating of telephone communications quality in which listeners judge transmissions by qualifiers, such as excellent, good, fair, poor, or unsatisfactory.

Quality of service

QoS

Quality of Service
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