From: Ellen K. 

OH!   I already knew about the 10's and the 192's, although I didn't
know how those ended up always only being internal.   But I didn't know
that was called "private IP addressing".

Thanks.   :)

On Mon, 28 Mar 2005 22:51:03 -0500, "Rich Gauszka"
 wrote in message :

>
> "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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