Which of the following is an example of a technical control?

Firewalls represent a technical control because they are hardware or software tools designed specifically to enforce security policies by filtering and monitoring network traffic based on predetermined security rules. They play a crucial role in network security by providing a barrier between trusted internal networks and untrusted external networks, effectively preventing unauthorized access and potential threats.

In contrast, security policies are more about the framework and guidelines that govern how security measures are to be implemented, which makes them administrative rather than technical. Employee training focuses on the human aspect of security, aiming to enhance awareness and behavior but does not directly involve technology. Lastly, incident response teams are organized groups that manage security incidents, which is a procedural and organizational control rather than a direct technical measure. Understanding the distinction between these types of controls is essential for effectively implementing a comprehensive security strategy.