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Upload Download speed difference [duplicate]

Upload Download speed difference [duplicate]

When I test my hi-speed, I get (approx>):

Asked by: Guest | Views: 91
Total answers/comments: 2
Guest [Entry]

"You are probably on a ADSL Connection.

ADSL stand for Asymmetrical DSL (or if you wish, Asymmetric digital subscriber line). In this type of communications speed is always considerably higher in one direction, hence the ""Asymmetrical"". However, on a Asymmetrical connection, which direction is higher is determined by the service provider. So there is not real impediment for upload speeds to be higher than download.

As for the reasons why this is a preferably mechanism, read below (source):

There are both technical and marketing
reasons why ADSL is in many places the
most common type offered to home
users. On the technical side, there is
likely to be more crosstalk from other
circuits at the DSLAM end (where the
wires from many local loops are close
to each other) than at the customer
premises. Thus the upload signal is
weakest at the noisiest part of the
local loop, while the download signal
is strongest at the noisiest part of
the local loop. It therefore makes
technical sense to have the DSLAM
transmit at a higher bit rate than
does the modem on the customer end.
Since the typical home user in fact
does prefer a higher download speed,
the telephone companies chose to make
a virtue out of necessity, hence ADSL.
On the marketing side, limiting upload
speeds limits the attractiveness of
this service to business customers,
often causing them to purchase higher
cost Leased line services instead. In
this fashion, it segments the digital
communications market between business
and home users."
Guest [Entry]

"many ISP offer a ratio of 8/1 for domestic connections (download speed is 8 times higher than the upload speed). and as usual, the small print applies, it's always 'up to'.

contention ratio is another factor for varying connection speeds, the higher the contention ratio, the greater the number of users that may be trying to use the actual bandwidth at any one time and, therefore, the lower the effective bandwidth offered, especially at peak times.

for a more accurate answer, refer to to the connection specifications of your provider."