---+ Bandwidth-Delay Product (BDP) The BDP of a path is the product of the (bottleneck) bandwidth and the delay of the path. Its dimension is "information", because bandwidth (here) expresses information per time, and delay is a time (duration). Typically, one uses bytes as a unit, and it is often useful to think of BDP as the "memory capacity" of a path, i.e. the amount of data that fits entirely into the path (between two end-systems). BDP is an important parameter for the performance of [[WindowBasedTransmission][window-based protocols]] such as [[TransmissionControlProtocol][TCP]]. Network paths with a large bandwidth-delay product are called [[LongFatNetworks][Long Fat Networks or "LFNs"]]. ---++ References * _What is the Bandwidth * Delay Product?,_ speedguide.net Tweaking FAQ, http://www.speedguide.net/faq_in_q.php?category=89&qid=185 -- Main.SimonLeinen - 14 Apr 2005
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Topic revision: r3 - 2005-07-05
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