Package arping2: Information

Arping is an utility to find out whether a specific IP address
on the LAN is 'taken' and what MAC address owns it.

Sure, you *could* just use 'ping' to find out if it's taken and
even if the computer blocks ping (and everything else) you still
get an entry in your ARP cache.

But what if you aren't on a routable net? Or the host blocks ping
(all ICMP even)?  Then you're screwed. Or you use arping.
Which might not yield realistic result as well.