[PCTECH] Private IP addresses

["Dan Bale" <dbale@xxxxxxxxxxxxx>]

On AS400pro.com, I found the following reference:

Private IP addresses
10.x.x.x  Full Class A
172.16.x.x - 172.31.x.x  Multiple Class B addresses
192.168.x.x  Multiple Class C addresses

Can someone point me to an "easy" reference to the meanings of the
"classes", or describe them here?  I have some familiarity with the last one
as my PC at home uses a "C" address sitting behind a router/firewall, which
itself uses the IP address assigned by the ISP.  My PC at work is assigned a
class "B" address.

But what are the differences between them?

tia,
db