From owner-freebsd-doc Thu Dec 19 11:40:23 2002 Delivered-To: freebsd-doc@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 461FF37B401 for ; Thu, 19 Dec 2002 11:40:22 -0800 (PST) Received: from otter3.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3DF6F43EDA for ; Thu, 19 Dec 2002 11:40:17 -0800 (PST) (envelope-from anderson@centtech.com) Received: (from root@localhost) by otter3.centtech.com (8.12.3/8.12.3) id gBJJe6HW071608; Thu, 19 Dec 2002 13:40:06 -0600 (CST) (envelope-from anderson@centtech.com) Received: from centtech.com (electron.centtech.com [204.177.173.173]) by otter3.centtech.com (8.12.3/8.12.3) with ESMTP id gBJJe4NG071601; Thu, 19 Dec 2002 13:40:04 -0600 (CST) (envelope-from anderson@centtech.com) Message-ID: <3E022075.4040703@centtech.com> Date: Thu, 19 Dec 2002 13:39:33 -0600 From: Eric Anderson User-Agent: Mozilla/5.0 (X11; U; Linux i386; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Gary W. Swearingen" Cc: "Jeffrey P.Bogert" , freebsd-doc@freebsd.org Subject: Re: FreeBSD Handbook References: <3E01FA5E.87B6FC46@mitre.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by AMaViS perl-11 Sender: owner-freebsd-doc@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Gary W. Swearingen wrote: > "Jeffrey P.Bogert" writes: > > >>2) on page 53 in the section "Netmask" >>the Class C block should be 192.168.0.0-192.168.0.255 instead of >>192.168.0.0-192.168.255.255 > > > Many understand this better than I, but let me flag this for review. > > My copy says: > > Netmask > > The address block being used for this local area network is a Class > C block (192.168.0.0 - 192.168.255.255). The default netmask is for > a Class C network (255.255.255.0). > > All of which is correct, methinks. That 192.168.0.0 - 192.168.255.255 > is the Class C block of addresses reserved for private use on a LAN such > as is being configured here. In these sub-netting days, the term > "block" needn't be limited to a "natural" Class C network of 256 hosts. A class C has 256 IP's in it - the above is incorrect. 192.168.0.0 - 192.168.255.255 would be the size of a class B network. If 192.168.0.0 - 192.168.255.255 were a class c, then a class b would have to be 192.0.0.0 - 192.255.255.255, and a class a would be 0.0.0.0 - 255.255.255.255, which would be all IP's on the ipv4 internet, which it is not. Eric -- ------------------------------------------------------------------ Eric Anderson Systems Administrator Centaur Technology Beware the fury of a patient man. ------------------------------------------------------------------ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message