On Thu, May 08, 2003 at 10:01:17AM -0700, J C Lawrence wrote:
That is their function. Domain names are human friendly strings which
can be used as keys in DNS lookups to derive IP information, they are
provided again as keys in virtual hosting protocols as a key to the
delivery target. They're functionally a shorthand notation for, "That
IP" and "that delivery service at that IP" -- they have no direct
representation or use other than as lookup keys.
you also wrote:
*> Domain names are convenience tokens, addressing shorthands, not first
*> class tokens or identities.
These two paragraphs are contrary.
In the environment of name based virtual hosts "that IP" will give you
nothing associated with "domain name" without providing it, so it is a
primary key.
Same for email. smtp.easydns.com is MX for kanga.nu. Injecting a email
addressed to "claw" at smtp.easydns.com will not make it to kanga.nu
without providing the domain name. So this is a primary key.
220 smtp.easydns.com ESMTP spoken here.
MAIL FROM: <maex(_at_)space(_dot_)net>
250 Ok
RCPT TO: <claw>
554 <claw>: Recipient address rejected: Relay access denied
I'm both examples it is not the sole primary key, but you need both
to accomplish the task.
\Maex
--
SpaceNet AG | Joseph-Dollinger-Bogen 14 | Fon: +49 (89) 32356-0
Research & Development | D-80807 Muenchen | Fax: +49 (89) 32356-299
"The security, stability and reliability of a computer system is reciprocally
proportional to the amount of vacuity between the ears of the admin"
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg