What guideline aids in preventing unauthorized access incidents?

The most effective guideline for preventing unauthorized access incidents is to implement strong authentication for resources. Strong authentication methods, such as multi-factor authentication (MFA), ensure that access to sensitive systems and data is granted only to authorized users. This added layer of security requires users to provide two or more verification factors, which significantly reduces the risk of unauthorized access caused by compromised accounts or inadequate password protection.

While having a password policy is important, simply creating a password policy does not ensure that authentication measures are robust enough to prevent unauthorized access. Designing the network to block suspicious traffic focuses more on external threats than directly managing user authentication, which is critical for access control. Strong authentication measures directly address the issue of unauthorized users attempting to gain access, making this approach vital in a comprehensive security strategy.