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From: Chuck Swiger <cswiger@mac.com>
Date: Tue, 12 Dec 2006 09:52:15 -0800
To: Martin Alejandro Paredes Sanchez <mapsware@prodigy.net.mx>
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Cc: a@zeos.net, freebsd-questions@freebsd.org
Subject: Re: How does my computer work with an empty arp table?
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On Dec 11, 2006, at 11:14 PM, Martin Alejandro Paredes Sanchez wrote:
>> Yes, you are right, I forgot about PPP. Many thanks.
>
> Also, the ARP table only contain info of your subnet

The ARP table only contains information about machines on the  
directly connected collision domain(s).

It's entirely possible to run multiple IP subnets on the same hub or  
switch, and even ARP for machines outside the configured subnet on  
one machine even when no IP routing information is available for that  
other subnet...

-- 
-Chuck