D is incorrect, A is the correct answer.
-sS: Performs a SYN scan, which is efficient and stealthy for discovering open TCP ports.
-sA: Conducts an ACK scan to determine if the ports are filtered, which helps in understanding the firewall rules and network filtering.
-sV: Attempts to detect the version of the services running on the open ports.
-F: Fast Scan, which scans the top 100 ports.
I tested it in my lab.
The only cmd that gives me results is: nmap IP... -sC -sV -Pn (C)
The rest I get: You specified more than one type of TCP scan. Please choose only one of -sA, -b, -sT, -sF, -sI, -sM, -sN, -sS, -sW, and -sX
QUITTING!
The error occurs because you specified more than one type of TCP scan (example:-sT and -sA) in the same nmap command. Nmap does not allow combining multiple TCP scan types as they are mutually exclusive.
generally speaking, "most common ports" in the context of Nmap implies the most commonly used 1,000 ports.
upvoted 2 times
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