When your computer requests that page, the time is noted. Then code at the end of the large file requests a second page. When your computer requests that second page, the time is noted and the transfer speed calculated. Another handy tool for determining speed and even more data about your connection is Net. Medic 1.2.2 from Lucent Technologies NetworkCare.
Medic dashboard shows statistics about downstream and upstream rates.
It tells how many hops the packets are making to and from servers. It can also tell when a server is failing to respond to a data request. An overloaded CPU can cause surfing delays. Free floating You can leave the individual panes of information in Net. Medic s dashboard or set them free to float by themselves.