Which of the following actions can significantly reduce the risk of attack vectors?

Implementing strong authentication methods is crucial in reducing the risk of attack vectors. This practice enhances security by ensuring that only authorized users can access sensitive data and resources. Strong authentication can involve techniques such as multi-factor authentication (MFA), the use of complex passwords, and biometric verification. By making it more challenging for unauthorized users to gain access, the likelihood of successful attacks diminishes significantly.

In contrast, using outdated software poses a security risk as it may have known vulnerabilities that attackers can exploit. Enabling guest access for visitors can increase exposure to security threats, as it often provides a pathway for unauthorized access to the network. Allowing unrestricted access to all users not only increases the risk of insider threats but also makes it easier for malicious actors to exploit security gaps. Therefore, strong authentication methods are a vital line of defense in safeguarding against various cyber threats.