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

A deterrent control is designed to discourage individuals from attempting to engage in undesirable or malicious actions. Warning signs serve this purpose effectively by informing potential intruders that they are being watched or that certain consequences will follow if they attempt to breach security protocols. The presence of warning signs can lead individuals to think twice before engaging in unauthorized activities, thus acting as a preventive measure.

In contrast, firewalls, encryption methods, and access control lists are more focused on protection and restricting access to systems and data rather than deterring actions. Firewalls specifically work by monitoring and controlling incoming and outgoing network traffic, while encryption methods protect the confidentiality of data by converting it into a secure format. Access control lists manage permissions and specify who can access certain resources or areas within a system. While these controls are crucial for securing information and systems, they do not inherently serve to discourage individuals from attempting unauthorized actions in the same way that warning signs do.