Which type of attack seeks to disrupt service availability?

The type of attack that seeks to disrupt service availability is a Denial of Service (DoS) attack. This attack is designed to make a network service unavailable to its intended users by overwhelming it with a flood of illegitimate requests or by exploiting vulnerabilities to crash the system. The primary goal of a DoS attack is to render a service unresponsive, thereby preventing legitimate users from accessing the resource.

In contrast, phishing is focused on tricking individuals into providing sensitive information, malware involves malicious software that can cause harm to a system or steal data, and keylogging is a method of capturing keystrokes to record what a user types, often used for stealing information like passwords. These other attack types do not primarily aim to disrupt service availability but instead target user information or system integrity.