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To: dnsop@cafax.se
From: "D. J. Bernstein" <djb@cr.yp.to>
Date: 10 Aug 2003 06:04:56 -0000
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Sender: owner-dnsop@cafax.se
Subject: Re: scope

Rob Austein writes:
> a significant fraction of the total root server query load
> is the result of bad packet filtering

Think about the numbers for a moment.

The screwups you're talking about, added up over the _entire Internet_,
are on the scale of thousands of packets per second. Split the same
screwup level across all of the Internet's ISPs and the load becomes
unnoticeable.

Furthermore, even the most extreme DNS loads are miniscule compared to
HTTP load. Root-server load is special, because it has a serious (and
unnecessary) centralization problem; ISP-cache load isn't, and doesn't.
Do you think ISPs say to themselves ``Wow, our expenses are totally out
of control; it must be because of all those customers dropping responses
from our DNS caches''?

---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago
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