To download on a Unix like system, try:

wget -O /dev/null http://speedtest.tele2.net/10GB.zip -4


http://speedtest.tele2.net/10GB.zip
Resolving speedtest.tele2.net (speedtest.tele2.net)... 90.130.70.73
Connecting to speedtest.tele2.net (speedtest.tele2.net)|90.130.70.73|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 10737418240 (10G) [application/zip]
Saving to: ‘/dev/null’

/dev/null        37%[==========================================>                                                          ]   3.78G   106MB/s    eta 61s

We got a 106 MB/s result. This means that the download speed on your server is 850 Mbit/s.