Oliver intends to obtain open-source intelligence data using an automated tool that can utilize search engines and tools like Shodan. Which of the following tools should he choose?

Among the given choices, theHarvester is the only tool that serves as an open-source intelligence tool. Curl is utilized for data transfer, hping is often employed for constructing custom packets and carrying out packet analysis functions, while netcat is a versatile tool that permits reading and writing to network connections, making it widely used for penetration testers and attackers who require a compact, effective utility for data transfer.