--On Monday, 07 July, 2008 17:19 +0000 John Levine
<johnl(_at_)iecc(_dot_)com> wrote:
...
* The proportion of invalid traffic, i.e., DNS pollution,
hitting the roots is still high, over 99% of the queries
should not even be sent to the root servers. We found an
extremely strong correlation both years: the higher the
query rate of a client, the lower the fraction of valid
queries.
That suggests that if the legit traffic increased by an order
of magnitude, it would still be down in the noise compared to
the junk. Conversely, if root server traffic is an issue,
getting networks to clean up their DNS traffic would be much
more effective than limiting the number of TLDs.
http://www.caida.org/research/dns/roottraffic/comparison06_07.
xml
John,
While I find this interesting, I don't see much logical or
statistical justification for the belief that, if one increased
(by a lot) the number of TLDs, the amount of "invalid" traffic
would remain roughly constant, rather than increasing the
multiplier.
And, of course, two of the ways of having "networks [to] clean
up their DNS traffic" depend on local caching of the root zone
(see previous note) and filtering out root queries for
implausible domains. Both of those are facilitated by smaller
root zones and impeded by very large ones.
john
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