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I S P  G L O S S A R Y
Your source for the most up-to-date terms, definitions, and acronyms for and about internet service providers.

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ABR
Last modified: Monday, October 20, 2008 

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.

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Webopedia's Quick Reference Section
Use this Webopedia reference section for information on common Internet and computer facts and occurrences.

Related Categories

Data Transfer Rates

Networking Standards

Related Terms

ATM

CBR

QoS

throughput

UBR

VBR

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