----- Original Message -----
From: "Patrick W. Gilmore" <patrick@ianai.net>
I suspect that, to a first approximation, "traffic which passes through the edge of at least one AS" is probably what most people think of as 'Internet' traffic.
As per my original post to this thread, that would remove all traffic from Akamai on-net nodes, Google's GGC nodes, Netflix's on-net Open Connect nodes, and many others.
If you are a broadband network in many countries, that is well over half the traffic going down your customer's pipes.
I think most people would alter their definition to count that traffic.
Ok, "to a zeroth approximation". That said: it depends on what you're trying to measure, as has been pointed out before: the entire *point* of edge caching is "to get all that duplicated traffic 'off of the Internet'," no?
As for your DNS question: the interior query isn't, per-se, but the repeated one from your resolver/proxy *is*.
I don't think the type of packet (DNS, HTTP, SMTP, etc. or even TCP, IP, ICMP) should matter.
The rest of those are generally not application-level proxied the way DNS is with most consumer edge NAT routers. Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274