How does this Speed Test work?

Using this application you can measure your Internet connection speed and delays. You can start the test to automatically selected servers or choose one of the available server points on the map. Then the test is begun.

This application uses Flash player plugin or HTML5 technology when Flash is not available. We use simple TCP socket to transmit data from client to server. This transmission is established on 8080 TCP port so transmission through the port must open on system firewall. TCP socket connection made by Flash player also require 843 TCP to be open.

If 8080 TCP port is not available, the application switches into http legacy mode. In this case the test is performed via standard 80 TCP HTTP port. Please note that http legacy mode is not so accurate as TCP socket mode because of http protocol character.