Questions: Joseph, a black-hat hacker, wants to bring a railway website down so that it fails to serve the people who want to book tickets. Which of the following attacks will he perform? A O Watering hole B O Heap spraying C O Man-in-the-middle D O Denial of service

The answer is the fourth one (or D): Denial of service.

Explanation for each option:

A. Watering hole: This type of attack involves compromising a specific group of end users by infecting websites that they are known to visit. This is not directly aimed at bringing down a website but rather at targeting specific users.

B. Heap spraying: This is a technique used in exploiting software vulnerabilities, particularly in web browsers, by filling the heap with a payload in order to execute arbitrary code. This is not typically used to bring down a website.

C. Man-in-the-middle: This attack involves intercepting and potentially altering the communication between two parties without their knowledge. While it can be used to steal information or inject malicious content, it is not primarily aimed at bringing down a website.

D. Denial of service: This attack aims to make a website or service unavailable to its intended users by overwhelming it with a flood of illegitimate requests, thereby exhausting its resources. This is the most appropriate method for bringing down a website.

Summary: Joseph, a black-hat hacker, would perform a Denial of Service (DoS) attack to bring down the railway website and prevent people from booking tickets.