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ABR Last modified: Wednesday, February 26, 2003
Short for available bit rate, or Class C quality of service, an ATM bandwidth-allocation service that adjusts the amount of bandwidth based on the amount of traffic in the network. ABR service provides a guaranteed minimum bandwidth capacity but allows data to be bursted at higher capacities when the network is free. Compare with CBR, UBR and VBR.
	Related Categories Data Transfer Rates Networking Standards Related Terms ATM CBR QoS throughput UBR VBR