Which statement best describes the relationship between -A and OS detection (-O)?

• A. -A is unrelated to OS detection.
• B. -A disables OS detection.
• C. -A includes OS detection as part of its features.
• D. -A only performs port scanning with no OS data.

Answer: (C)

The key idea is that -A is an aggressive scan mode that enables several discovery features in one go, and OS detection is included among them. OS detection (-O) identifies the target’s operating system by analyzing how the host responds to various probes. When you run -A, Nmap automatically performs OS detection along with version detection (-sV), default script scanning, and traceroute. That makes the statement that -A includes OS detection as part of its features the best description. The other options don’t fit because -A does not ignore, disable, or limit itself to only port scanning; it actively combines OS detection with additional checks.