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VBR
Last modified: Wednesday, February 26, 2003 

Short for variable bit rate, or Class B quality of service, an ATM bandwidth-allocation service that allows users to specify a throughput capacity (i.e., a peak rate) and a sustained rate but data is not sent evenly. VBR is often used when transmitting compressed packetized voice and video data, such as videoconferencing.

Compare with ABR, CBR and UBR.

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For internet.com pages about VBR . Also check out the following links!

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related categories

Data Transfer Rates

Networking Standards

Videoconferencing

related terms

ABR

ATM

CBR

QoS

throughput

UBR

videoconferencing


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