Which security measure can be taken to mitigate unauthorized access incidents?

Implementing two-factor authentication (2FA) is an effective security measure to mitigate unauthorized access incidents because it adds an additional layer of security beyond just a username and password. With 2FA, users must provide two different forms of identification to access their accounts. Typically, this involves something the user knows (like a password) and something the user has (such as a mobile device that receives a code). This means that even if a malicious actor manages to obtain a user’s password, they would still need the second form of authentication to gain access. Thus, 2FA significantly reduces the risk of unauthorized access.

While ignoring suspicious login attempts does not contribute to security and restricting internet access may reduce overall flexibility but doesn't specifically address the risk of unauthorized access, training users on password security can help strengthen their individual defenses. However, the method that provides a direct and immediate enhancement to access control security is two-factor authentication, making it the most effective choice for minimizing unauthorized access incidents.