What is the purpose of a denial of service attack?

The purpose of a denial of service attack is to disrupt or shut down a service. In this type of attack, the primary goal is to overwhelm the target system—such as a website, server, or network resource—by flooding it with excessive traffic or by exploiting vulnerabilities that lead to service outages. This causes legitimate users to be unable to access the service, thereby achieving the disruptive intention of the attack.

Options that suggest disabling security systems or gaining unauthorized access address different tactics and intentions. Disabling security systems may be a side effect of certain attacks, but it's not the primary goal of a denial of service attack. Similarly, gaining unauthorized access to data points to a different kind of attack aimed at data theft rather than service disruption. The option that claims to enhance service availability contradicts the fundamental nature of a denial of service attack, which is inherently about impeding access and service reliability.