From owner-freebsd-questions@FreeBSD.ORG  Tue Nov 23 23:48:53 2004
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0721016A4CE
	for <freebsd-questions@freebsd.org>;
	Tue, 23 Nov 2004 23:48:53 +0000 (GMT)
Received: from helium.webpack.hosteurope.de (helium.webpack.hosteurope.de
	[217.115.142.90])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 8AF2C43D45
	for <freebsd-questions@freebsd.org>;
	Tue, 23 Nov 2004 23:48:52 +0000 (GMT)	(envelope-from me@hexren.net)
Received: by helium.webpack.hosteurope.de running Exim 4.34 using asmtp
	helo=hexren.steenbuck.net)
	id 1CWkOw-0003Ws-ND; Wed, 24 Nov 2004 00:48:50 +0100
Date: Wed, 24 Nov 2004 00:48:49 +0100
From: Hexren <me@hexren.net>
X-Mailer: The Bat! (v1.62i) Business
X-Priority: 3 (Normal)
Message-ID: <5557305861.20041124004849@hexren.net>
To: Jonathon McKitrick <jcm@FreeBSD-uk.eu.org>
In-Reply-To: <20041123233501.GA82229@dogma.freebsd-uk.eu.org>
References: <20041123233501.GA82229@dogma.freebsd-uk.eu.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: freebsd-questions@freebsd.org
Subject: Re: 4 part domain names
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: Hexren <me@hexren.net>
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 23 Nov 2004 23:48:53 -0000


JM> AFAIK, a fully qualified domain name is like

JM> machine.domain.xxx

JM> but what about addresses like

JM> us.510.mail.yahoo.com??

JM> Is there any hierarchy to the names in this case?

JM> jm

---------------------------------------------

I would think that viewing mail.yahoo.com as machine.domain.xxx might
be flawed if you think of mail.yahoo.com as
subdomain.domain.top-level-domain it is (or so I think) easier to
comprehend that
subdomain.subdomain.domain.top-level-domain is not that different.
Now add to that picture that every subdomain could be an alias for another
domain or point to an IP address, which incase of the IP address is
meaning a real machine.

Did I misinterpret your question ?

Hexren