Re: [idn] The Business Card problem (was: Re: An experiment with UTF-8domain names)

[John C Klensin <klensin@jck.com>]

--On Tuesday, January 16, 2001 5:47 PM +0900 GIM Gyeongseog-KIM
Kyongsok <gimgs@asadal.cs.pusan.ac.kr> wrote:

>> And then tries to make a change, such as to re-home the host,
>> the two names may, due to differences in usage, take
>> significantly different times to propagagate.  
> 
>   i am somewhat confused here.  this situation can happen
> with ordinary (i.e., non-IDN) domain names.  
>   i would like to know whether you claim the above problem is 
> the DNS problem in general or a problem specific with IDNs?

The widespread introduction of IDNs is likely to put considerable
multipliers on these problems.  We have learned to avoid or work
around them at relatively small scale, but they may not be
acceptable at larger scale.  As a single, trivial, example, most
web sites today that utilize many names pointing to the site
typically list only one name in the reverse-mapping.  In an IDN
context, there would be considerable (consideraby more) incentive
to try to reverse-map to both "English" and "national" names.
Note, for example, that, for routers and similar resources, IA4
names are required by an ITU recommendation that many ISPs feel
obligated to honor and that integrity of reverse mappings for
these devices is often considered quite important.

    john