From owner-freebsd-questions Wed Dec 25 20:33:45 2002 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 D748137B401; Wed, 25 Dec 2002 20:33:43 -0800 (PST) Received: from rwcrmhc53.attbi.com (rwcrmhc53.attbi.com [204.127.198.39]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5795943EC2; Wed, 25 Dec 2002 20:33:43 -0800 (PST) (envelope-from swear@attbi.com) Received: from localhost.localdomain ([12.242.158.67]) by rwcrmhc53.attbi.com (rwcrmhc53) with ESMTP id <2002122604333705300k6br2e>; Thu, 26 Dec 2002 04:33:37 +0000 Received: from localhost.localdomain (localhost [127.0.0.1]) by localhost.localdomain (8.12.6/8.12.5) with ESMTP id gBQ4XCmG039368; Wed, 25 Dec 2002 20:33:12 -0800 (PST) (envelope-from swear@attbi.com) Received: (from jojo@localhost) by localhost.localdomain (8.12.6/8.12.5/Submit) id gBQ4X1sD039365; Wed, 25 Dec 2002 20:33:01 -0800 (PST) (envelope-from swear@attbi.com) X-Authentication-Warning: localhost.localdomain: jojo set sender to swear@attbi.com using -f To: Adam Weinberger Cc: "Gary W. Swearingen" , Roman Neuhauser , Kurt Bigler , freebsd-questions@FreeBSD.ORG Subject: Re: email addresses used for lists [was: L0phtcrack] References: <79of793f6v.f79@localhost.localdomain> <20021225225521.GT690@freepuppy.bellavista.cz> <451y4536xb.y45@localhost.localdomain> <20021226014311.GB215@vectors.cx> From: swear@attbi.com (Gary W. Swearingen) Date: 25 Dec 2002 20:33:01 -0800 In-Reply-To: <20021226014311.GB215@vectors.cx> Message-ID: Lines: 52 User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.1 (Cuyahoga Valley) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Adam Weinberger writes: > >> (12.25.2002 @ 1728 PST): Gary W. Swearingen said, in 2.0K: << > > > > I'm not sure what that means. ... > semantic > adj : of or relating to the study of meaning and changes of > meaning; "semantic analysis" OK, good. Thanks. I think your "dict" definitions for "domain" and "hostname" do not disagree with mine (though they're certainly different), except for this part for "hostname": > 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). That's just wrong, if it's trying to imply that a Fully Qualified Domain Name (like "foldoc.doc.ic.ac.uk") is not the name of a domain. A hostname *IS* a domain name, either a FQDN or a part of one. In fact, when configured to support default domains, the host's domain name (AKA hostname) can also be specified as foldoc or foldoc.doc or foldoc.doc.ic, etc. Maybe "dict" should have had "{default domain}" or "{parent domain}" instead of "{domain}". > > Roman Neuhauser writes: > > > 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. Do you really want to say that a Fully Qualified Domain Name is not a domain name? Both hostnames and domain names are just labels applied to something that exists, namely info in the DNS databases; there need not be any physical host for a configured IP. It's a system that translates IP numbers to domain names and vice-versa; it's the Domain Name System, not the Host Name System. We choose to associate most domain names (the ones with IP numbers) with something we call hosts and so we may also call them hostnames if we want. -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message