Is it possible to measure Internet pipe to find bottleneck?

[Kurt Buff]

On Thu, Mar 27, 2014 at 7:18 AM, Steven Friedrich
<steven.e.friedrich at gmail.com> wrote:
> I have TWC Internet (formerly InsightBB).  I can measure my Internet pipe
> using a couple sites on the Internet, but that's a composite rating, meaning
> it doesn't differentiate between the parts of the pipeline.
>
> I would like to know which piece of my pipeline is the limiting factor.  Is
> my pipe from my Internet provider ever saturated, or is my cable modem or
> router limiting my overall speed?
>
> Any tools out there that are freely available or low-cost that will clarify
> this?

Smokeping is one possibility.