Which type of attack can disrupt a system's service through malware?

• A. Denial of Service Attack
• B. Social Engineering
• C. Incapacitation
• D. Phishing

Answer: (C)

The type of attack that can disrupt a system's service through malware is best represented by the first choice, a Denial of Service Attack. This type of attack aims to make a service unavailable to its intended users by overwhelming the resources of the targeted system, often utilizing a large number of compromised devices in a botnet to flood the target with traffic or requests.

While the other types of attacks mentioned, such as social engineering and phishing, primarily focus on manipulating individuals to gain unauthorized access to information or systems, they do not typically disrupt services in the same way. Social engineering involves tactics designed to deceive people into revealing confidential information, while phishing is a method to gain sensitive data through fraudulent communications.

Incapacitation might refer to rendering a system inoperable but is not a standard term associated with malware attacks specifically designed to disrupt services.

In summary, a Denial of Service Attack is specifically designed to disrupt services, often employing malware in the process, making it the most accurate answer to the question.