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Re: A slight call to order (Re: Internic address allocation policy )

  • From: Steven J. Richardson
  • Date: Mon Mar 20 13:32:55 1995

  > Date:  Mon, 20 Mar 1995 11:21:12 -0600 (CST)
  > From:  karl@mcs.com (Karl Denninger)
  > To:    nanog@merit.edu


  > > > Taking a relatively small chunk of the remaining address space
  > > > (say, 210.*.*.*) gives us 64k addresses to hand out in convenient
  > > 
  > > That's 16M addresses, not 64K addresses.  We should not equivocate "addre
sses"
  > > and "Class C networks".  210.*.*.* has 2^24 (minus subnet zero and broadc
ast
  > > lossage) addresses -- 16M.  210.*.*.* has 2^16 "Class C networks" -- 64K.
  We
  > > must not assume that every customer will get a Class C -- many will get j
ust a
  > > subnet since they will only have a handful of hosts.  I know of several 
  > > providers who are chopping things up on nybble boundaries (16 hosts/net, 
or
  > > actually 14 with the subnet zero and broadcast taken out).
  > 
  > Not me!
  > 
  > I consider a "Class B equivalent" to be 256 NETWORKS, by the common use of
  > the term, but 65K *addresses*.

1 Class-B-sized prefix = 256 Class-C-sized prefixes.
A "network" could be a Class A, B, C, etc., network, or a CIDR network,
etc.

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