Spaces in hostnames?

[Sebastian Hagedorn]

--On 14. August 2006 11:19:36 -0700 Kenneth Porter <shiva at sewingwitch.com> 
wrote:

> --On Wednesday, August 09, 2006 4:33 PM +0200 Sebastian Hagedorn
> <Hagedorn at uni-koeln.de> wrote:
>
>>> In DNS an underscore character is not legal in a hostname.
>>
>> That hasn't been true for a long time:
>>
>> <http://www.faqs.org/rfcs/rfc2181.html>
>
> There's a difference between names in general and hostnames. The hostname
> restriction is an application restriction layered on top of DNS, not a
> DNS  protocol restriction.

How do you mean? I just verified that underscores in hostnames work fine in 
e.g. browsers.
-- 
     .:.Sebastian Hagedorn - RZKR-R1 (Gebäude 52), Zimmer 18.:.
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