Consider the following Nmap output: What command-line parameter could you use to determine the type and version number of the web server?

-sv (lowercase) is not a recognized Nmap scanning flag; the valid service version detection parameter is -sV (uppercase V), which actively probes services with protocol-specific payloads to determine version details.

-Pn disables host discovery and skips the ping phase, treating the target as online regardless of ICMP responses - it does not retrieve service type or version information.

-V (uppercase) outputs Nmap's own installed version number and is not a scan parameter targeting remote hosts.

The -sS flag (TCP SYN stealth scan) initiates half-open TCP connections and captures service banner responses from open ports, which can expose web server type and version information embedded in those banners during the connection attempt.