[SunRescue] Networking details (was Re: OT: Advice on Certification)

[rescue at sunhelp.org]

If you don't *selectively* quote the RFC, you have:

------
The Internet Assigned Numbers Authority (IANA) has reserved the following
three blocks of the IP address space for private internets: 

          10.0.0.0        -   10.255.255.255  (10/8 prefix)
          172.16.0.0      -   172.31.255.255  (172.16/12 prefix)
          192.168.0.0     -   192.168.255.255 (192.168/16 prefix)

We will refer to the first block as "24-bit block", the second as
"20-bit block", and to the third as "16-bit" block. Note that (in pre-CIDR
notation) the first block is nothing but a single class A network number,
while the second block is a set of 16 contiguous class B network numbers,
and third block is a set of 256 contiguous class C network numbers. 

------

So in one place they write it as a /12(likely as a convenience), then they
present it on the same line as a range, implying it to be a single, large
network, then they label is in a final sentence as 16 contiguous class
B's.  

I hate it when people selectively quote to support a position.

> > The other good one is the 172.16.0.0 RFC1918 block.  It's a /12 or /13
> > IIRC, not a /16. :)
> 
> no, it's a set of 16 contiguous class B's, and hence it is actually
> multiple /16's as opposed to a /12...

> 
> ...if we're going to be picky about what classful address space is.. ;)



> the fact remains that when most people these days say "i want a class
> C" they mean "i want a slash-twenty-four" and "i've not read any of the
> registry documents concerning efficient use of address space, i either
> don't know what ENAT is or am going to ignore it as a possibilty, etc
> etc". ;)
> 
> dave.
> 
> 
> _______________________________________________
> rescue maillist  -  rescue at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/rescue
>