Underscore Character

[Barry Margolin]

In article <F931488C3634D11180D700A02461E24501E98B30 at chitmd03.nt.il.nbgfn.com>,
 <kevinm at crt.com> wrote:
>I've got another quick question about the "_" character.  I was in a two day
>conference last week that showed the "_" being used in the SRV RR.  This
>appears to be the default naming for SRV RR's.  Is this true and does this
>mean that the "_" is ONLY valid for SRV RR's?

Underscores are disallowed in hostnames.  They're allowed in other
contexts.  The specification of SRV records chose to use underscores
precisely so that they would never conflict with hostnames.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
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