On 15 May 2018 at 12:34, Tony Finch <d...@dotat.at> wrote:
> Ted Lemon <mel...@fugue.com> wrote: > > > It might be useful to compare this to labels like _tcp that appear in SRV > > records and elsewhere. > > The reason for listing a name in the RCF 6761 registry is because it needs > special handling of some kind in DNS software. That isn't the case for the > _underscore names, which (from the DNS point of view) are just ordinary > domain names that have conventional uses in applications. > > I'm going to suggest a modification to your first sentence. The reason for listing a name int he RFC 6761 registry is because it needs special handling of some kind in DNS software that would otherwise be unaware of the special handling required by that name. In this case, the only name servers that need to handle these names specially are the ones implementing the technology.. all other name servers treat them as ordinary names.
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