An attacker repeatedly enters the wrong password for the manager's account and has now locked the account. Which category of the CIA triad was compromised?

The correct answer is related to the concept of availability within the CIA triad. Availability refers to ensuring that authorized users have access to information and resources when needed. In this scenario, the attacker’s repeated entry of incorrect passwords has led to the manager's account being locked. This action directly impacts the manager’s ability to access their account and the resources associated with it, thus compromising availability.

When an account is locked due to multiple failed login attempts, legitimate users are prevented from accessing their data and services, which disrupts normal operations. This situation highlights how attacks on system access can make resources unavailable to the user, even if the integrity of the data remains intact and the confidentiality of the information is not necessarily compromised.