What are roving security controls primarily composed of?

Roving security controls are primarily associated with the physical security measures that can actively monitor and respond to potential threats in various locations. These measures often include the presence of security guards who patrol areas to deter criminal activity and ensure safety. Security guards offer a human element that can assess situations, interact with individuals, and provide a quick response to incidents.

Additionally, drones can enhance these capabilities by providing aerial surveillance and allowing for real-time monitoring of large areas. Drones equipped with cameras can cover wider areas more efficiently than traditional patrols, and they can also gather intelligence that aids in the proactive management of security concerns.

In contrast, the other options focus on technology or tools not typically associated with roving security. For instance, firearms and surveillance cameras, while relevant to security, do not embody the dynamic aspect of "roving" controls since they are generally fixed points or provide passive observation. Software firewalls and antivirus programs are related to cybersecurity and protect against digital threats rather than physical security, and network tools and encryption protocols mainly relate to securing data transmission rather than an on-the-ground security presence. Thus, the combination of security guards and drones provides a comprehensive approach to dynamic, on-site security management, making it the most fitting answer.