From: "Rich Gauszka" 


 "Ellen K."  wrote in message
news:1djh41l53g9ui0i1qk71g36futh2aigpa5{at}4ax.com...
> Wow, thanks for the very clear explanation.   (Except I don't know what
> "private IP addressing" means.)
>
>

http://kb.indiana.edu/data/aijr.html?cust=369140.19003.30

InterNIC has reserved certain IP addresses as private addresses for use
with internal Web sites or intranets. These addresses are not routable on
the public Internet, but are meant for devices that reside behind a router
or other Network Address Translation (NAT) device or proxy server. Private
IP addresses are used either to hide systems from the public Internet or to
provide an additional range of addresses to organizations that do not have
sufficient public IP addresses to distribute on their network.
Organizations can use these numbers to assign internal IP addresses without
having to worry about an IP address conflict or having to obtain a new
block of IP addresses.



The IP addresses that can be used for internal networks are listed below:

For IPv4:

  a.. 10.0.0.0 - 10.255.255.255


  b.. 172.16.0.0 - 172.31.255.255


  c.. 192.168.0.0 - 192.168.255.255

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