EC-Council
312-50V9 · Question #108
312-50V9 Question #108: Real Exam Question with Answer & Explanation
The correct answer is D: NMAP -O. The -O flag is the dedicated Nmap switch for OS detection via TCP/IP stack fingerprinting.
Question
Which of the following parameters enables NMAP's operating system detection feature?
Options
- ANMAP -sV
- BNMAP -oS
- CNMAP -sR
- DNMAP -O
Explanation
The -O flag is the dedicated Nmap switch for OS detection via TCP/IP stack fingerprinting.
Common mistakes.
- A. -sV enables service and version detection on open ports, not operating system identification.
- B. -oS is an output format option that renders results in stylized 'script kiddie' text, not a scanning or detection feature.
- C. -sR was a legacy RPC scan flag that has since been deprecated and was never used for OS detection.
Concept tested. Nmap OS detection flag -O
Reference. https://nmap.org/book/man-os-detection.html
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