This packet sniffer-come-bandwidth Meter, Monitors Wireless DSL, Adsl / DSL modems and high speed internet services bandwidth transfers. A broadband speed test is never the same twice. An Internet speed test relies on various factors including line quality, ISP reliability and location of both computers in which the tests are being conducted and servers in between. Performing a regular broadband speed check is a good way to monitor your internet speed and to notice problems early. Windows Vista handles high speed Internet bandwidth better than XP.