You are scanning into the target network for the first time. You find very few conventional ports open. When you attempt to perform traditional service identification by connecting to the open ports, it yields either unreliable or no results. You are unsure of which protocols are being used. You need to discover as many different protocols as possible.

Which kind of scan would you use to achieve this? (Choose the best answer)

A.
Nessus scan with TCP based pings.

B.
Nmap scan with the �sP (Ping scan) switch.

C.
Netcat scan with the �u �e switches.

D.
Nmap with the �sO (Raw IP packets) switch.

Explanation:
Running Nmap with the sO switch will do a IP Protocol Scan. The IP protocol scan is a bit different than the other nmap scans. The IP protocol scan is searching for additional IP protocols in use by the remote station, such as ICMP, TCP, and UDP. If a router is scanned, additional IP protocols such as EGP or IGP may be identified.