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Upload speeds are generally slower than download speeds because of the fact that most internet connected equipment is asymmetric. Asymmetric means that any one packet of data can either go in, or out, but not both ways at the same time.

Since most internet users are receiving more data than sending, the internet connected equipment has shifted the higher majority of the signals to go toward downloading.

If an internet provider allows your connection to be 5Mb download and 1Mb upload, this same connection is capable of handling 3Mb upload and 3 Mb download. But this would then slow down the most important part of the internet, the receiving and downloading of requested data.

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14y ago
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15y ago

in UPLOADING the analog signal must be sampled at the switching station.In this direction,quantization noise is introduced into the signal ,which reduces the SNR ratio and limits the rate to 33.6.

BUT...there is no sampling in DOWNLOADING .the signal is not affected by quantization noise and no subject to the Shanon capacity limitation.The maximum data rate in uploading direction is still 33.6,but the data rate in the dowloading direction is now 56kbps.

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14y ago

That's because most ISPs (Internet Service Providers) offers ADSL (Asymmetric Digital Subscriber Line) technology to their customers. You can find out more about ADSL here: http://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line

This comes as default because most of the time, whether you are just simply browsing through the internet or playing games, you are 80% retrieving (or downloading) the data from the remote server (where the website is hosted). Oftentimes, you only upload a tiny bit volume (e.g. text, image, etc.) in comparison to download.

If you wish the two to be equal (e.g. if you run a server), you can switch to SDSL or SHDSL and their cousins. [ http://en.wikipedia.org/wiki/Symmetric_digital_subscriber_line ]

Here's a tip to remember them: If "Asymmetric DSL" is one-way flow, then "Symmetric DSL" is both-way flow (equal). (Hence: the letter "A" in Asymmetric.)

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Q: Why are upload speeds slower than download speeds?
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Why adsl upload speeds slower than download speeds?

This is by design, and is reflected in the name - the A in ADSL stands for Asymmetric, reflecting the fact that the speed is not the same in both directions.There are both technical and marketing reasons for this. On the technical side, it is simpler to provide high speed in the download than the upload direction. On the marketing side, this allows companies to sell high download speeds to private customers for a relatively low cost, since download speed is what most households are interested in, while at the same time charging much more for business customers that need high upload speed as well.See related link.


Why up-link speed is less than down-link speed?

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To download means to receive data to a local system from a remote system, or to initiate such a data transfer.To upload means to "send" data to a local system from a remote system, or to initiate such a data transfer. It takes longer to upload than to download because the upload speed it 2x slower than that of the actual video. Then the uploader must process the data and extract all information from the video. It must also covert the video to our format as well.


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What is a difference between symmetrical and asymmetrical broadband?

If it's like the DSL terminology, these terms refer to the upload/download speeds. Symmetrical means that the upload (sending) speed is the same as the download (receiving) speed. Asymmetrical means that the upload and download speeds are not the same. This is the most common, especially for home use. Typically the download speed is faster than the upload speed (more data is usually downloaded than uploaded). If somebody was running a website or server, they might want the opposite, because they would be sending out more than receiving. Asymmetrical is more common, because it makes better use of the resources. For simplicity, say you decide to pay for the equivalent of a total bandwidth of 30 Mbps (megabits per second). They could either allocate the resources as 25 Mbps download and 5 Mbps upload, or 15 & 15. So depending on your needs, if you download a lot, you'd probably want the faster download speed, without having to pay for the faster upload speed, which you may not really need.


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Is 291 kbps download speed and 527 kbps upload speed fast internet?

It depends whether the speed is real or theoretical. That said, your asymmetrical speeds are highly irregular, as normally, download speeds are many times higher than upload speeds. To sum it up, though, 291/527 is not fast. It is high-speed, alright, in the sense that it is not dial-up. But as far as broadband internet speeds go, this is pretty slow. Five mbps would be fast. Anything about one is generally good. Anything below is equivalent to the introductory services most ISPs (Internet Service Providers) offer.


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