Posted by John M. Martinelli on Oct 03
This would work but it would be kind of "noisy" to open port scanevery host. Also probably a little more time consuming.
Adding in syn scan or open port scan will create more time required as
we're now looking for open ports. What if all ports are closed? Will
it respond to a certain type of ICMP?
I think a great question to ask is: "What is the least-impactful way I
can very quickly determine what hosts are alive?"...