XPost: alt.comp.os.windows-11   
   From: daniel47@somewhere.someplaceelse   
      
   On 8/09/2025 10:21 pm, Dan Purgert wrote:   
   > On 2025-09-08, Daniel70 wrote:   
   >> [...]   
   >> Which got me thinking ..... How do "they" Speed-test Internet Links?? ..   
   >> particularly How do 'they' distinguish the Up-link TIME from the   
   >> Down-link TIME?? e.g. my current speeds, using Speedtest [...]   
   >   
   > For the most part, a speedtest works by you downloading a file of known   
   > size (say 100 MiB), and then sending it back.  Exact file size will vary   
   > by testing provider, but essentially it's just this:   
   >   
   > Download start = 0.00   
   > Download end = [TIME]   
   >   
   > File size / TIME = X Mbit / sec   
      
   But how does the distant end know when I have received the entire file   
   (i.e. Download end time)??   
   >   
   > Upload Start = 0.00   
   > Upload end = [TIME]   
   >   
   > File size / TIME = Y Mbit / Sec   
   >   
   Similarly, how does the distant end know when my computer started the   
   Upload (Upload start time)??   
   --   
   Daniel70   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)