FAST.com speed test gives you an estimate of your current Internet speed. You will generally be able to get this speed from leading Internet services, which use globally distributed servers.
The definitions for the terminology used in the speed test can be found below. Download Speed: The speed of the connection when downloading from the Internet to your computer. Upload Speed: The speed of the connection when uploading data from your computer to another computer somewhere on the Internet. Google Fiber, RCN, and Verizon have the fastest tested internet speeds in the US, according to our fastest internet providers 2020 report, which is based on more than 2.4 million results from our internet speed test. Xfinity also offers fast internet speeds, and it performs well in every tested region in the country. An internet speed test measures the connection speed and quality of your connected device to the internet. It does so by running multiple consecutive tests that analyze different aspects of your internet connection, namely ping (latency), download speed, and upload speed. I suspect that my problem with Ookla speed test is the same regardless as to whether I am using and iPhone App. Chrome extension or Windows 10 App or ISP website page embedded app. The fundamental problem with the app and I suspect it's entire database of results is this. It is biased towards success.
Download speed is most relevant for people who are consuming content on the Internet, and we want FAST.com to be a very simple and fast speed test.
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If results from FAST.com and other internet speed tests (like dslreports.com or speedtest.net) often show less speed than you have paid for, you can ask your ISP about the results.