Which service footprints a web server by collecting server name, server type, operating systems, and applications running?

Which service footprints a web server by collecting server name, server type, operating systems, and applications running?

• A. Telnet
• B. Nmap
• C. Firmware Mod Kit
• D. Binwalk

Answer: (A)

Footprinting a web server to learn what software and operating system it’s running is done by a network scanner that probes services and reads banners to identify details. The tool that fits this description best is Nmap, because it can perform service/version detection and OS detection. By running with version detection and OS detection (for example, -sV -O or using -A), Nmap reveals the server software (the server type), its version, the operating system, and often the applications or modules in use. This is exactly the kind of fingerprinting described: identifying server name or vendor, the services listening on ports, the operating system, and the applications running behind those services. Telnet, while it is a protocol for remote login, is not a comprehensive fingerprinting tool for a web server and won’t systematically reveal the full stack. The other two tools are focused on firmware analysis and don’t apply to live web server reconnaissance.

Footprinting a web server to learn what software and operating system it’s running is done by a network scanner that probes services and reads banners to identify details. The tool that fits this description best is Nmap, because it can perform service/version detection and OS detection. By running with version detection and OS detection (for example, -sV -O or using -A), Nmap reveals the server software (the server type), its version, the operating system, and often the applications or modules in use. This is exactly the kind of fingerprinting described: identifying server name or vendor, the services listening on ports, the operating system, and the applications running behind those services.

Telnet, while it is a protocol for remote login, is not a comprehensive fingerprinting tool for a web server and won’t systematically reveal the full stack. The other two tools are focused on firmware analysis and don’t apply to live web server reconnaissance.