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Date:      Mon, 16 Aug 1999 22:19:16 -0400 (EDT)
From:      "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com>
To:        dsj@sylvester.dsj.net
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: segment, subnet
Message-ID:  <199908170219.WAA09363@cc942873-a.ewndsr1.nj.home.com>
In-Reply-To: <19990816205039.E44880@juno.dsj.net> from "David S. Jackson" at "Aug 16, 99 08:50:39 pm"

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David S. Jackson wrote,
> What's the difference between a subnet and a network segment?

A 'segment' almost always refers to a physical partitioning of a
network. Typically, on an Ethernet network, a segment is any portion
separated from another by a brigde, router, hub, switch, etc.

The term 'subnet' is a bit more nebulous. Someone may refer to a
physical segment as a subnet, but I would say it is more proper to
speak of subnets only when you are discussing routing. That is,
whereas several segments of an Ethernet might be connected in a
switch, they must be one subnet since there is no routing.

Or in other words, segments are how you breakup an Ethernet, subnets
are how you breakup an IP network.

My $0.02
-- 
Crist J. Clark                           cjclark@home.com


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