From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,HTML_FONT_LOW_CONTRAST, HTML_IMAGE_ONLY_24,HTML_MESSAGE,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=no autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 0c0e7d69 for ; Mon, 4 Feb 2019 21:35:11 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id DF5E69B8A3; Tue, 5 Feb 2019 07:35:09 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 3FA4F9B892; Tue, 5 Feb 2019 07:34:46 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (1024-bit key; unprotected) header.d=ccc.com header.i=@ccc.com header.b="i16dXDlB"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id D94789B892; Tue, 5 Feb 2019 07:34:44 +1000 (AEST) Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) by minnie.tuhs.org (Postfix) with ESMTPS id EAD2C9B891 for ; Tue, 5 Feb 2019 07:34:43 +1000 (AEST) Received: by mail-wm1-f47.google.com with SMTP id m1so1476002wml.2 for ; Mon, 04 Feb 2019 13:34:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccc.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=S8MBoRujUOTiIzj32M43uDYkmYwWYs1jpt7Zhfa/msM=; b=i16dXDlByLmh6ST5ne28KgWTzeTC006yMhuJhUOkJOEyArWQck95Fn6e7cJmipiLsc CTMgrhlWIC2B2b0OuR1fHBZH7V2Kw+Tb6rMxCIn0eAZ6qlX96CGoQzxZwS7sLeKBEKnh K5nZSDU9gS+BbhLABF7vwStsimjPLQ+uEUgyQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=S8MBoRujUOTiIzj32M43uDYkmYwWYs1jpt7Zhfa/msM=; b=PUkTOtTvHCQWiPjVEX3dS8QFnlAURHiXIqbB8laMr/oXbfRaWj5KNm1AotYEaF94Wp 3LRM3Fe4qXp9sXI2TJGMzwJ90KdnCNSsdzIikQ/0ihAZEZvX1b6uUQ9g2hX1vsdK2Nf7 11u3dBqMP58wI1lq85UsZxbwfeoh6IZeLzpea2QJHnW+Lxzv3lVfASJoG3NVbg01WkFf RSLpiRl26U/4tZXzCif7sGH4lMSW5QgLCGE3bwxsKEk43PkLFosvkmgJ4cWmTmiUZQb4 Mg/5yTStqMWoVP1BlGwZt9hwhI2vRW7CpspXBU7BlT0tPKtd/yolljZ8Gpo3lHhW2IJq iRqg== X-Gm-Message-State: AHQUAuY17ImZE/xhubgk+EAy8BHOpygDZKFNFB8A41gzN+POGvWfHTg0 a+8kuG2KteHCwIGksRjDJBsX88wrVLSYDkHfh7r22zDG X-Google-Smtp-Source: AHgI3IboZDk9hQSObTAC+LCMhiES0BkdBcVedUu+QNSdFJsPduI1vxlsSvZGBJYEP2PpoNbzbcdrFSZRs4RzuKbz1w4= X-Received: by 2002:a1c:30b:: with SMTP id 11mr1021307wmd.110.1549316082336; Mon, 04 Feb 2019 13:34:42 -0800 (PST) MIME-Version: 1.0 References: <20190204202947.69A4818C082@mercury.lcs.mit.edu> <2CFCAF1D-9EEC-43EB-AEC5-D58C30C5D923@bitblocks.com> In-Reply-To: <2CFCAF1D-9EEC-43EB-AEC5-D58C30C5D923@bitblocks.com> From: Clem Cole Date: Mon, 4 Feb 2019 16:34:16 -0500 Message-ID: To: Bakul Shah Content-Type: multipart/alternative; boundary="000000000000bbbdd50581184285" Subject: Re: [TUHS] OSI stack (Was: Posters) X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --000000000000bbbdd50581184285 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, Feb 4, 2019 at 4:23 PM Bakul Shah wrote: > On Feb 4, 2019, at 12:29 PM, Noel Chiappa wrote= : > > > >> From: Grant Taylor > > > >> I'm not quite sure what you mean by naming a node vs network interface= . > > > > Does one name (in the generic high-level sense of the term 'name'; e.g. > an > > 'address' is a name for a unit of main memory) apply to the node (host) > no > > matter how many interfaces it has, or where it is/moves in the network? > If so, > > that name names the node. If not... > > Xerox Network System (XNS) also had this property. A node had a > unique 48 bit address and each network had a unique 32 bit address. > Absolute host numbering meant you could move a host to another > network easily. IDP packet layout > Yeah, at the time, MetCalfe had the advantage of seeing what NCP and IP had already learned. We used to say in hindsight, Ethernet had too many address bits and IP not enough. So Noel and team invented ARP ;-) Clem =E1=90=A7 --000000000000bbbdd50581184285 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Mon, Feb 4, 2019 at 4:23 = PM Bakul Shah <bakul@bitblocks.co= m> wrote:
On Feb 4, 2019, at 12:29 PM, Noel Chiappa <jnc@mercury.lcs.mit.edu> wrote:
= >
>> From: Grant Taylor
>
>> I'm not quite= sure what you mean by naming a node vs network interface.
>
>= Does one name (in the generic high-level sense of the term 'name';= e.g. an
> 'address' is a name for a unit of main memory) app= ly to the node (host) no
> matter how many interfaces it has, or wher= e it is/moves in the network? If so,
> that name names the node. If n= ot...

Xerox Network System (XNS) also had this property. A node had a
uniq= ue 48 bit address and each network had a unique 32 bit address.
Absolute= host numbering meant you could move a host to another
network easily. I= DP packet layout

Yeah, at the time, MetCa= lfe had the advantage of seeing what NCP and IP had already learned.=C2=A0 = =C2=A0We used to say in hindsight, Ethernet had too many address bits and I= P not enough.=C2=A0 =C2=A0 So Noel and team invented ARP ;-)

Clem
3D""=E1=90=A7
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