Comments on: Differences between synchronous and asynchronous data transfers http://itknowledgeexchange.techtarget.com/itanswers/differences-between-synchronous-and-asynchronous-data-transfers/ Wed, 22 May 2013 05:05:11 +0000 hourly 1 By: jmkelly http://itknowledgeexchange.techtarget.com/itanswers/differences-between-synchronous-and-asynchronous-data-transfers/#comment-52311 jmkelly Fri, 14 Mar 2008 02:03:11 +0000 #comment-52311 Buddyfarr, it’s ASSYMETRIC Digital Subscriber Link (or Line) — it’s assymetric because, as you said, the download bandwidth is not equal to the upload bandwidth. Whether the phone company uses a synchronous or asynchronous protocol to provide the service is up to the phone company.

“Synchronous” means that the transmitter and receiver are clocked together — that timing is essential to the signaling scheme, and if a certain voltage change/phase transition/whatever arrives early or late, an error will ensue. “Asynchronous” means timing doesn’t matter.

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