The author states in the 7th paragraph that -
Quote:
Originally Posted by Woody Leonhard
“A” in an “ADSL” connection means “asynchronous”
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That is incorrect. The A in ADSL stands for "Asymmetric" and refers to the fact that
more bandwidth is allocated to the downstream than the upstream.
The word "asynchronous" means "not synchronized" and basically when we use
it as engineers we are referring to some means of communicating data where there is no
external global clock. Instead, the receiver must synchronize itself by transitions
embedded within the data itself.
Leonhard then goes on to say -
Quote:
Originally Posted by Woody Leonhard
... which, in almost all cases, is optimized for downloads at the expense of upload speeds. Some services — typically for business — provide similar upload and download speed
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which is again incorrect.
ADSL is asymmetric by design in
all cases not in "almost all cases".
SDSL or Symmetric Digital Subscriber Line technology provides the same amount of bandwidth downstream as upstream.