Some bad assumptions about domain resolution (was Re: Some techinical questions regarding bind Data)
Matthew Pounsett
matt at conundrum.com
Sun Feb 24 21:36:49 UTC 2008
On 24-Feb-2008, at 13:01 , Peter Dambier wrote:
>
> Let an answer for one level take some 50 msec, it might take longer.
> 126 levels will take 6.3 seconds.
This has nothing to do with the number of labels in a name. You're
assuming a delegation at each separator, which can't be assumed.
> People in canada and uk have been running away from names like
> "someboy.co.qc.ca" to "somebody.tk" because it resolves faster.
This is a false statement. Not only is this based on a broken
assumption that each separator involves a delegation, but it reveals
your misunderstanding of what labels are imposed by the registries
involved.
Under .ca there is a growing tendency to register names directly under
the TLD rather than in one of the provincial sub-domains, but not
because of resolution time. name.qc.ca and name.ca would reach the
authoritative servers for the 'name' portion of the domain in exactly
the same amount of time. People started moving that way in 2000 when
the registration rules were relaxed purely because of the shorter name.
You also seem to assume the existence of organizational sub-domains
(co.qc.ca) within the .ca domain (co, org, etc.), which do not
exist. .ca allows registrations directly under the TLD, or in one of
the provincial/territorial sub-domains; that is all.
Since you were talking about the ca and uk registries, did you mean
for your second example above to be 'somebody.uk'? It looks like a
typo. That sort of name can't be registered by the general public
under .uk because they do use organizational sub-domains which are
(generally speaking) not optional. If any exceptions exist at all,
they're very few in number.
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