[LinuxUsers] IP Subnetting explained.

[Roger E. Rustad, Jr]

Here is a resource I found helpful a while back (like in '99).

http://www.3com.com/other/pdfs/infra/corpinfo/en_US/501302.pdf

(Not exactly a cheat sheet, but something a bit more comprehensive that 
will help you quickly understand a cheat sheet.)

Another great subnetting tool I like is this:

http://apps.csc.fi/laskin2.html

The other week I was planning out some subnets for some VLANs for the 
fire, PD, and SWAT teams for wireless roaming, and I to figure out which 
subnets would neatly encompass the ranges I needed.

So, say you need to find out which subnets to use to get the range 
192.168.1.0 - 192.168.5.128.  You'd punch in both addresses in that calc 
and get the following output

192.168.1.0/255.255.255.0	192.168.1.0/0.0.0.255	192.168.1.0/ 24
192.168.2.0/255.255.254.0	192.168.2.0/0.0.1.255	192.168.2.0/ 23
192.168.4.0/255.255.255.0	192.168.4.0/0.0.0.255	192.168.4.0/ 24
192.168.5.0/255.255.255.128	192.168.5.0/0.0.0.127	192.168.5.0/ 25
192.168.5.128/255.255.255.255	192.168.5.128/0.0.0.0	192.168.5.128/ 32
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