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VBR

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.

VBR


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