Aug 28, · All you have to do at this point is click the green “Begin Test” button, and slicelive.com will check both your download and upload speed. This may take anywhere from a few seconds to a few Author: Nick Mediati. Our upload and download speed test tool shows you exactly how quickly you can get data to and from the server. Use our download and upload test to see if you’re getting the speeds promised by your provider or if your connection is fit for high-bandwidth apps like video streaming or VoIP. Jul 11, · The difference between download speeds and upload speeds can be explained in the following way: download speed refers to the rate that digital data is transferred from the Internet to your computer, while upload speed is the rate that online data is .