Re: [Sheflug] Class B or C?

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

> > 
> > 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.

I wasn't very clear...apologies. 192.168.0.0/24 -> 192.168.255.0/24 is the 
range and yes it is all class C...I specified it as /16 simply 'cos it was 
quicker and shorter and meant the same thing :)

> 
> > 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 ?

Umm...it's just one of these things I've picked up, which may or may not be 
correct (I've never checked), though putting thought into it there is no 
reason why it couldn't be used. The only reason I can see for avoiding it is 
to avoid confusion that could arise when talking about broadcast addresses 
(eg, 192.168.255.255 ... without the netmask you don't know if its a 
broadcast for the 192.168.255.0/24 net or 192.168.0.0/16 net).

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   \______


---------------------------------------------------------------------
Sheffield Linux User's Group - http://www.sheflug.co.uk
To unsubscribe from this list send mail to
- <sheflug-request [at] vuw.ac.nz> - with the word 
 "unsubscribe" in the body of the message. 

  GNU the choice of a complete generation.