Which tool is used to discover information about internet-connected devices, including routers and cameras?

• A. Nmap
• B. Burp Suite
• C. Shodan
• D. OpenVAS

Answer: (C)

Shodan is designed to reveal information about internet-connected devices, such as routers and cameras, by indexing data collected from their network banners and exposed services. It functions like a global search engine for devices on the internet, letting you query by device type, vendor, location, or specific service details to see what is publicly reachable and what they are exposing. This makes it the best answer for discovering information about internet-facing devices across the world, not just within a single network or for testing a specific web application.

Nmap, by contrast, is a general-purpose network mapper used to discover hosts and open ports on networks you can access. Burp Suite focuses on testing the security of web applications, not on discovering internet-wide devices. OpenVAS is a vulnerability scanner that assesses known hosts for weaknesses, rather than providing a broad view of internet-connected devices.