--On Monday, 07 July, 2008 17:19 +0000 John Levine <johnl@xxxxxxxx> 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 _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf