North American Network Operators Group
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Re: The Mathematical Reality of IP Addressin in IPv4...

  • From: bmanning
  • Date: Thu Aug 26 13:25:43 1999 
> What this proposal appears to be proposing is to permit NON-CONTIGUOUS
> netmasks such as:
> 
>   255.128.127.0
> 
> Or, in binary:
> 
>  1111111111 10000000 01111111 00000000
> 
> Thus, the network number would actually consist of all 8 bits of octet
> one, the first bit of octet two, the last 7 bits of octet 3 and none of
> octed four.
> 

Non-contigious masks were allowed up until the CIDR era... :)

--bill