Re: [Sheflug] Class B or C?

["Chris J/#6" <nospam [at] nccnet.co.uk>]

> 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 
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).

But you can make it up...CIDR (Classless Inter-Domain Routing) and have a 18 
bit netmask and a 14 bit hostmask if you really wanted, which would really 
confuse anyone that came to look at your network. Practical example: our work 
network splits 194.62.154.0 into 4 networks with a 26-bit netmask (which 
would be 255.255.255.192).

As 192.168.0.0/16 is allocated as private address space, you can subnet as 
you see fit and not break anything apart from your own little network :)

RFC's ... 1338, 1518 and 1918 cover supernetting (and CIDR), more about CIDR 
and private address allocation respectivly :)

Chris...

-- 
Chris Johnson            \  "If not for me then, do it for yourself. If not
sixie@nccnet.co.uk        \  for then do it for the world." -- Stevie Nicks
www.nccnet.co.uk/~sixie/   ~---------------------------------------+
Redclaw chat - http://redclaw.org.uk - telnet redclaw.org.uk 2000   \______


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