Re: Testing Internet Speeds and Capacity

[Xai Xi <xaixili () live com>]

As mentioned, there is a limitation to TCP-based speed tests - TCP throughput is very sensitive to packet losses, 
particularly during slow-start, in addition to requiring end-host tuning (as an exercise, try running speedtest.net on 
a high bandwidth connection). You could use something called "available bandwidth", which is kind of like the "leftover 
capacity" on your path - I've been using this tool called pathload2: 
http://www.measurementlab.net/measurement-lab-tools#pathload2

                                          
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