What is the difference between ADSL downstream and upstream data transfer?
The Residential ADSL High-speed Service provides you with a two-way asymmetrical stream of data. With ADSL, downstream data can pass to your computer much faster than from you computer. For home use, people tend to be more of a consumer of data than a producer of data. With this in mind, it only makes sense to sacrifice upstream (data going from your computer) capacity in exchange for a larger downstream (data to your computer) capacity.