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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