On Mon, Nov 18, 2002 at 01:22:39AM +0800, [EMAIL PROTECTED] wrote: > Michael Schwendt wrote:
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> > On 17 Nov 2002 07:44:38 -0500, Doug Potter wrote:
> >
> > > Actually that is a class B address.
> > >
> > > The first octet of a class A is 1-126 (127 reserved for loop back)
> > > class B is 128-191
> > > class C is 192-223
> > >
> > > since 172 is between the ranges of 128-191 that would make it class B
> > >
> > > Class B subnet 255.255.0.0 or /16
> >
> > The step from Class B to /16 is beyond me. If memory serves
> > correctly, the Class B subnet in RFC1918 is 172.16.0.0/12
> > which would be netmask 255.240.0.0.
> I want to know how do you know the the netmask is 255.240.0.0 ?
He doesn't. He's wrong. An old Class B was a /16 by definition.
What he's quoting is the definition for the 16 Class B addresses which
were specified for private address space usage. The formed a /12 band.
He has not answered the original question and has provided erronious
information about the old Class B addresses based on a missreading an
missunderstanding of the Private Address Space RFC 1918.
> Thank for your telling !
> Edward.
>
>
>
>
>
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--
Michael H. Warfield | (770) 985-6132 | [EMAIL PROTECTED]
/\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/
NIC whois: MHW9 | An optimist believes we live in the best of all
PGP Key: 0xDF1DD471 | possible worlds. A pessimist is sure of it!
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