🚀 go-pugleaf

James Carlson ha escrito:

> "Watchman" <lewy@yebo.co.za> writes:
> > If you were given an IP address of 176.58.24.1 for your machine, but no
> > subnet mask, what subnet mask could you use by default?
> >
> > A - 255.0.0.0
> > B - 255.255.0.0
> > C - 255.255.255.0        or
> > D - 255.255.255.255
>
> Classful addressing is as dead as the person who put this question on
> your homework assignment.  ;-}
>
> The correct answer is "E" -- none of the above.  You can't use an IP
> address on a multi-access-type interface without an assigned subnet
> mask.  You can't.  Period.  There are no "default" values that are
> useful.
>
> The answer wanted, however, is likely to be B (255.255.0.0), since in
> the pre-CIDR days, that particular address would have been a class B
> address.
>
> --
> James Carlson, System Architect                     <carlson@ibnets.com>
> IronBridge Networks / 55 Hayden Avenue   71.246W   Vox:  +1 781 372 8132
> Lexington MA  02421-7996 / USA           42.423N   Fax:  +1 781 372 8090
> "PPP Design and Debugging" --- http://people.ne.mediaone.net/carlson/ppp

But anyway, the tcp/ip stack of almost any O.S. ask you for one....;-)

Mike