Which web service footprints a web server and gathers information such as server name, server type, operating systems, and applications running?

• A. Nmap
• B. Binwalk
• C. Airodump-ng
• D. Telnet

Answer: (D)

Web server fingerprinting is about identifying what software and operating system a web server is running, along with any applications it exposes. Nmap is the tool designed for this kind of discovery: by enabling version detection and OS detection, it probes services, grabs banners, and analyzes responses to reveal the server software name and version (like Apache or nginx), the underlying operating system, and often the applications in use. Binwalk focuses on firmware analysis, not live web servers; Airodump-ng is for wireless traffic capture; Telnet is just a remote-access protocol and doesn’t provide automated, reliable fingerprinting of a web server. So the best choice for gathering that footprint information is Nmap.