Re: [Sheflug] Class B or C?

[Jim Jackson <nospam [at] comp.leeds.ac.uk>]

On Tue, 31 Oct 2000, Chris J/#6 wrote:

> 
> > Hello everyone.
> > 
> >  My home network is running on 192.168.0.0/24 that is right isn't it?
> > 
> >  Or should it be 192.168.0.0/16?
> >  Can I just make it up?
> > 
> >  Just thought I'd check.
> > 
> 
> The entire 192.168.0.0/16 network is the class C private network, so yes you 

historically a "class C" C network is /24 and a /16 network is "class B"
and sometimes these are used as such - but in the CIDR world classes don't
make a lot of sense.

> should split it into a 24-bit netmask and 8-bit hostmask so that you have 256 
> networks 192.168.0.0/24 -> 192.168.255.0/24 (however 192.168.255.0/24 would 
> be reserved giving 255 useable networks).

Always been intrigued by this. Heard it before. But do you actually know 
the reason why some people don't recommend not using 192.168.255.0/24 ?

I would have thought 192.168.255.0 is a perfect good class C network number as
defined in the IP original specs.


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  GNU the choice of a complete generation.