Re: Subnetting Class C IP networks

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Article #57

#57

From: Ken Mintz
Date: Fri, 04 Mar 1994 18:06

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Mark Landin (landin@cherokee.nsuok.edu) wrote:
> Can you subnet a Class C address, say by using a mask like 255.255.255.128?

  Not 128 specifically, but certainly other values, such as 192, 224 etc.
  The problem with 128 per se is that that creates a one-bit subnet id.
  Since all-zero and all-one values have special meaning, subnet id and host
  id fields must comprise at least __two__ bits each.

-- Ken Mintz

PS:  Some implementations do permit one-bit subnet ids, but this is non-
conformant.

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arc1-ca.pugleaf.net!gmd.de!dearn!blekul11!news.cs.kuleuven.ac.be!ub4b!EU.net!howland.reston.ans.net! vixen.cso.uiuc.edu!sdd.hp.com!hpscit.sc.hp.com!cupnews0.cup.hp.com!mintz

References: <1994Mar4.142909.12080@cherokee.nsuok.edu>

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From: mintz@cup.hp.com (Ken Mintz)
Subject: Re: Subnetting Class C IP networks
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Date: Fri, 4 Mar 1994 18:06:07 GMT
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