Which Nmap option enables extensive detection such as OS detection and version scanning?

• A. -sV
• B. -O
• C. -sS
• D. -A

Answer: (D)

In Nmap, to get broad, multi-faceted detection in one go, you use the aggressive scan option. The -A setting enables several probing techniques at once, including OS detection, version scanning, script scanning, and traceroute. This gives you a comprehensive view of the target—identifying the operating system characteristics and the versions of running services together, along with additional insights from scripts and network path information.

Other options target specific aspects: -sV focuses only on determining service versions, -O focuses only on OS detection, and -sS is a stealth TCP SYN scan without the broader detection scope. Because -A combines these capabilities (and more), it’s the best choice when you want extensive detection like OS and version scanning.