Which flag allows version detection to consider all ports during scanning?

Which flag allows version detection to consider all ports during scanning?

• A. -sV --version-light
• B. -sV --allports
• C. -sV --version-intensity
• D. -sV

Answer: (B)

Version detection looks at services on scanned ports, but by default it probes only ports that are found open. The flag that expands this to include every port from 1 to 65535 is the allports option used with version detection. This tells Nmap to attempt to identify versions on all ports, not just the open ones, giving a fuller picture of what might be running where. It’s more thorough but also slower because there are many more probes to send. The other flags change how aggressively or how many probes are sent on the same set of ports (lighter probes or deeper probing) without widening the port scope. So combining version detection with allports is the way to have version detection consider all ports.

Version detection looks at services on scanned ports, but by default it probes only ports that are found open. The flag that expands this to include every port from 1 to 65535 is the allports option used with version detection. This tells Nmap to attempt to identify versions on all ports, not just the open ones, giving a fuller picture of what might be running where. It’s more thorough but also slower because there are many more probes to send. The other flags change how aggressively or how many probes are sent on the same set of ports (lighter probes or deeper probing) without widening the port scope. So combining version detection with allports is the way to have version detection consider all ports.