What type of control has Frank deployed by configuring an access control list for specific IP addresses?

The deployment of an access control list (ACL) for specific IP addresses signifies the use of a technical control. Technical controls are security measures that are enforced through technological solutions rather than through administrative or physical means. Access control lists are implemented in network devices, such as routers and firewalls, to allow or deny traffic based on IP addresses and other criteria. This enforcement of security policies through technology helps manage and restrict access to resources, thereby protecting the network from unauthorized access or potential threats.

Administrative controls, in contrast, involve policies and procedures established by an organization to govern behavior and establish compliance but do not involve technology directly. Physical controls include tangible security measures such as locks, surveillance cameras, or security guards, while operational controls focus on the day-to-day operations and maintenance of security processes. Each type of control has a specific role in a comprehensive security strategy, but the use of an access control list distinctly aligns with the characteristics of technical controls.