What type of attack does DoS refer to?

What type of attack does DoS refer to?

• A. An attack that makes a service available
• B. An attack that makes a service unavailable
• C. An attack aimed solely at data theft
• D. An attack targeting only network infrastructure

Answer: (B)

A Denial of Service (DoS) attack is specifically designed to make a network service or resource unavailable to its intended users. This is accomplished by overwhelming the target service with an excessive amount of traffic or requests, which leads to performance degradation or complete service disruption. The primary goal of such an attack is to deny legitimate users access to the service, effectively rendering it unusable.

In contrast, the other options describe different types of actions that do not align with the fundamental nature of a DoS attack. For instance, an attack that makes a service available would contradict the purpose of a DoS, as the attack would instead enhance accessibility. Similarly, while data theft-related attacks focus on acquiring sensitive information, they do not target service availability directly. Lastly, attacks that exclusively target network infrastructure may affect connectivity but do not necessarily align with the broader and more common definition of a DoS attack, which can target services and applications across multiple layers of a network.