Re: [DNSOP] AS112 for TLDs

Edward Lewis wrote:
> At 12:57 -0800 12/3/07, Brian Dickson wrote:
> 
>> What are the pros/cons of this, other than the obvious offloading
>> of junk TLD lookups?
> 
>  From http://www.nanog.org/mtg-0310/pdf/wessels.pdf:
> 
> See (unnumbered) slide "Punchline from Last Year's Talk":
> 
> Category            Percent of Total (see slide for all cat's)
> Unknown TLD          12.5
> ...
> Legitimate            2.15
> 
> Of course, that is 2002/2003 data.
> 
> 6:1 "bad TLD" to "good query."  Off-loading bad TLDs from the roots is a 
> big win.  As with any research citation, I encourage readers to look it 
> up too - to see if you agree with what I yanked out.

Sorry for the late response. About this matter, using the data collected 
at the root server instances participating in DITL 2007, we found 24.73% 
of the queries seen at the roots were for invalid TLD's.

Doing an analysis per root, the numbers vary

C-root		19.15%
F-root		46.79%
K-root		10.01%
M-root		20.96%

within the queries for invalid TLD, the distribution is

local		20.29%
localhost	 8.92%
domain		 3.15%
invalid		 2.43%
lan		 2.06%
belkin		 1.76%
home		 1.30%
localdomain	 1.29%
wpad		 0.74%
txt		 0.74%

You may want to check the presentation including this numbers at
http://public.oarci.net/files/workshop-2007/Castro-DITL2007-analysis.pdf

Regards
Sebastian Castro, CAIDA
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