# Comparing Internet speeds via throughput

How do you do a mathematical comparison to sort these in order of which is 'faster'  i.e. has greater throughput?

a) 5M Dedicated Internet
b) 1.55MB Internet T1
b) 30MB Cablevision
c) 75MB Verizon FIOS
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Fixer of ProblemsCommented:
All those 'speeds' will be in 'megabits per second' so the "75MB Verizon FIOS" is fastest.  But 'throughput' depends on availability as well as speed.  And you can't check or know that without having an account.  But I would go for the "75MB Verizon FIOS" if it was my choice.  It could have delays half the time and still be faster than all the others.

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Author Commented:
The throughput of each line depends on its actual (measured) latency. I used ping -t as an estimator, really a 'guestimator' of the VPN latency from one central point to and from various internet end points.   The central site has a 150MB FIOS connection and the relative results are useful except for the end point site that had a faster that 150MB FIOS connection.

From FIOS 150MB to
==================
a)150MB FIOS ==> 7 ms (The speed at this end is actually 300MB but it cannot respond faster than the speed of the sender which is 150MB FIOS.  This site also has an advantage since both the sender and the receiver are on the same FIOS network. )

b) 10 MB TWC DIA ==> 9 ms
c) 50 MB Cablevision ==> 17 ms
d) 50 MB Time Warner Cable =18 ms

This implies that the 10MB DIA (Dedicated Internet Access) is just as fast or maybe faster that the 150 MB FIOS which had a bias advantage.) DIA means dedicated internet access and the line from the line to the Time Warner Cable central office is not shared with any other customer.

I was not able to test the T1 because its a private T1 not an Internet T1 but an Internet T1 is also a dedicated line to the central office and I would expect its latency to be very small.

Is there anyone here with an Internet T1 that can give me a guestimate for latency?

(The latency between two of our end points using  (non internet ) private T1 to private T1 is 5 m/s which make it very fast compare to using the Internet between two end points but this question is really about Internet speeds.)
PrincipalCommented:
I rather doubt that any T1 measurement for latency would be very meaningful.  That's because it depends on many things which are likely different than YOUR setup / provider / etc.  But you may get answers that are helpful nonetheless.
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