What practice is essential for maintaining network security against credential-based attacks?

Using multi-factor authentication is essential for maintaining network security against credential-based attacks because it adds an additional layer of security beyond just a username and password. Credential-based attacks often rely on attackers acquiring valid user credentials through various means, such as phishing or brute force attacks. By implementing multi-factor authentication, even if a malicious actor successfully obtains a user’s password, they would still need an additional verification factor (such as a text message, authentication app, or biometric verification) to gain access.

This significantly lowers the likelihood of unauthorized access, as it requires multiple forms of verification that are harder for attackers to compromise simultaneously. The inclusion of this extra step helps safeguard sensitive information and systems effectively, making it a critical practice in network security.

Other practices listed, while useful for certain aspects of security, do not directly address the primary vulnerability presented by credential-based attacks. For instance, establishing a guest network helps isolate and protect the main network but does not enhance the security of individual credentials. Increasing public Wi-Fi access may inadvertently expose users to various risks without enhancing security. Employing social engineering training raises awareness about security threats but does not offer a technical solution to credential misuse. Therefore, multi-factor authentication stands out as a direct and impactful defensive measure against credential-based attacks.