Finally, it will depend on your source for the Download Speed Test.If you are using your provider's download speed test, it stays within their network and doesn't go out on the Internet. When you are downloading your file from a server, not on the TMIS, local network, you are going out over the Internet. The bottleneck could then be the ISP's capacity out to the general Internet. You are sharing this connection(s) with all other users of your chosen ISP and it is a source of congestion that will slow your results.
https://myspeedtest.bcz.com/2022/09/19/download-speed-tests/
