Date: Wed, 25 Dec 2002 17:43:11 -0800 From: Adam Weinberger <adamw@FreeBSD.ORG> To: "Gary W. Swearingen" <swear@attbi.com> Cc: Roman Neuhauser <neuhauser@bellavista.cz>, Kurt Bigler <kkb@breathhost.net>, freebsd-questions@FreeBSD.ORG Subject: Re: email addresses used for lists [was: L0phtcrack] Message-ID: <20021226014311.GB215@vectors.cx> In-Reply-To: <451y4536xb.y45@localhost.localdomain> References: <BA2DF089.5927%kkb@breathhost.net> <79of793f6v.f79@localhost.localdomain> <20021225225521.GT690@freepuppy.bellavista.cz> <451y4536xb.y45@localhost.localdomain>
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>> (12.25.2002 @ 1728 PST): Gary W. Swearingen said, in 2.0K: <<
> > It's just semantics, really.
>
> I'm not sure what that means. No, seriously, my dictionary says "study
> or science of the meaning of language forms", but does that include the
> meaning of single words or only about the meaning imparted by sentence
> structure, or something else?
monkey@smacky:~% dict semantic
- From WordNet (r) 1.7 [wn]:
semantic
adj : of or relating to the study of meaning and changes of
meaning; "semantic analysis"
> "Domain" means something like "a set of nodes in the DNS tree
> structure", where nodes have associated info about hosts and domains.
monkey@smacky:~% dict domain
- From The Free On-line Dictionary of Computing (09 FEB 02) [foldoc]:
domain
2. <networking> A group of computers whose {hostnames} share a
common suffix, the "domain name". The last component of this
is the {top-level domain}.
> "Hostname" sometimes seems to mean the string returned by the "hostname"
> command/function (being distinguished from hostname aliases), but I
> think it's fair in the DNS context to use "a domain name which has an
> assigned IP". (In the DNS, "host" doesn't mean "computer", of course.
> Hosts are whatever have assigned IP addresses, except maybe networks.
> Does DNS even know about networks? I can't think why it should.)
monkey@smacky:~% dict hostname
- From The Free On-line Dictionary of Computing (09 FEB 02) [foldoc]:
hostname
1. (Or "sitename"). The unique name by which a computer is
known on a {network}, used to identify it in {electronic
mail}, {Usenet} {news}, or other forms of electronic
information interchange.
On {Internet} the hostname is an {ASCII} string,
e.g. "foldoc.doc.ic.ac.uk" which, consists of a local part
(foldoc) and a {domain} name (doc.ic.ac.uk).
> > Let's say you have names "fubar.org", "alpha.fubar.org", and
> > "beta.fubar.org". There's no A RR for "fubar.org", but
> > "alpha.fubar.org" resolves to 1.2.3.4, and "beta.fubar.org" resolves
> > to 1.2.3.5. What is what here?
>
> They are all domain names and, except for "fubar.org", hostnames.
> (No host, no hostname.)
No. Only "fubar.org" is a domain name. The others are hostnames. A
domain name is just a name, but a hostname is a label applied to
something that exists. Every domain name can be a hostname if a computer
responds to that name.
> > Let's say you have names "fubar.org", "alpha.fubar.org", and
> > "beta.fubar.org". All three names resolve to 1.2.3.4. What is what
> > here?
>
> All are domain names and all are hostnames.
Again, no.
# Adam
- --
Adam Weinberger
vectors.cx >> adam@vectors.cx
FreeBSD.org << adamw@FreeBSD.ORG
Bayer Berkeley >> adam.weinberger.b@bayer.com
#vim:set ts=8: 8-char tabs prevent tooth decay.
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