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[ NNSquad ] Re: Comments on NNSquad Purpose


[ This message is passed to the list since it contains discussion
of technical parameters useful for measurement toolset R&D.
Any discussion that strays from the technical (and you know
what I mean) in response to this message will not be approved through to the list. 

                                               -- Lauren Weinstein
                                                  NNSquad Moderator ]



Jay Sulzberger wrote:

our packet streams.  But the fact is that if we give two numbers,
we have specified how good a Net connection is.

GIVE ME THE BANDWITH AND LATENCY LIMIT I PAID FOR!

DO NOT WIRETAP ME DO NOT DEGRADE MY STREAMS.

For if you do, I will produce evidence gathered by the
hardworking folk of NNSquad, who use this small suite of Net
tests, which give me back two numbers: bandwidth and lag.


I can think of three independent figures of merit for network neutrality:

1. Latency. I want to know how network latency changes with independent variables such as packet size, packet rate, source, destination, transport protocol, application protocol, user data, etc. Several other metrics can be expressed entirely in terms of latency: "Packet loss rate" is just the fraction of packets with infinite latency. "Bandwidth limit" is the packet size * rate product above which latency rises to keep the delivered size * rate product constant.

2. Transparency. Does the carrier deliver my packets to their specified destinations as I sent them, or are they intercepted and modified in some way? Transparent web proxying would be an example of non-transparent behavior. NAT would be another, although most NATs are under the customer's control and the ISP is to blame only for not making enough routeable IP addresses available.

3. Packet spoofing. Does the network inject packets that appear to be, but are not from the party with whom I am speaking? (apologies to Lily Tomlin) Comcast's TCP reset injection would be an example here.

What do people think of this list? Should anything be added? Changed? Redefined?

--Phil