My Internet device (a USB dongle) shows Internet speed very good. But actually, when I browse and surf websites, they all seem to load very slow. Even if none of sites are loading, all stopped, the device will still show much high download and upload speeds. It seems there's always something hidden traffic running on the background which I can't see. What it could be?
How can I know every single program using my Internet bandwidth? Is there any program for it?