Technical Preventive Control

A.

Out of the given options, "Two-factor authentication" is the technical preventive control.

A technical preventive control refers to the security measures implemented in software or hardware systems to prevent or block unauthorized access, data modification, or data theft. These controls are automated and can be configured to act immediately when a threat is detected.

Two-factor authentication (2FA) is a security mechanism that requires a user to provide two forms of identification to access a system or application. 2FA requires something the user knows, such as a password, and something the user has, such as a security token, a smart card, or a fingerprint. This extra layer of security significantly reduces the risk of unauthorized access and helps prevent data breaches.

Option B, "DVR-supported cameras," refers to a physical control or a surveillance system that may detect intrusions but cannot prevent them.

Option C, "Acceptable-use MOTD" (Message of the Day) is an administrative control that provides a warning or notice to users regarding the acceptable use of a system or application. While it can deter users from attempting malicious activity, it is not a technical control that can prevent such activity.

Option D, "Syslog server," is a technical detective control that logs and collects system events, including security-related events. It does not prevent or block unauthorized access, but rather provides a record of events that can be used for forensic purposes or system analysis.

In summary, the correct answer is A, "Two-factor authentication," as it is a technical preventive control that can help prevent unauthorized access and data breaches.