Path: utzoo!dciem!chan
From: chan@dciem.dciem.dnd.ca (Kam Tim CHAN)
Newsgroups: comp.protocols.tcp-ip
Subject: Internet Subnetting ...
Message-ID: <2602@dciem.dciem.dnd.ca>
Date: 20 Oct 89 13:49:58 GMT
Reply-To: chan@dretor (Kam Tim CHAN)
Distribution: na
Organization: D.C.I.E.M., Toronto, Canada
Lines: 35

I am in the process of setting up a new subnetting environment, and
I noted the following comment :

In RFC950 (Internet Standard Subnetting Procedure) : 
:      Special Addresses:
:
:         From the Assigned Numbers memo [9]:
:
:            "In certain contexts, it is useful to have fixed addresses
:            with functional significance rather than as identifiers of
:            specific hosts.  When such usage is called for, the address
:            zero is to be interpreted as meaning "this", as in "this
:            network".  The address of all ones are to be interpreted as
:            meaning "all", as in "all hosts".  For example, the address
:            128.9.255.255 could be interpreted as meaning all hosts on
:            the network 128.9.  Or, the address 0.0.0.37 could be
:            interpreted as meaning host 37 on this network."
:
:         It is useful to preserve and extend the interpretation of these
:         special addresses in subnetted networks.  This means the values
:         of all zeros and all ones in the subnet field should not be
:         assigned to actual (physical) subnets.

However, I was thinking of using just 1 bit to be the subnet field,
therefore my subnet field is either all zero or all one. Would any one of
you comment on this special case issue, please ?

Thanks in advance.

Tim Chan
-- 
          Tim Chan, Systems Specialist  (416)-635-2073
     Defence and Civil Institute of Environmental Medicine
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