What is the difference between "access control" and "surveillance"?

Access control refers to the systems and procedures used to limit who can enter or interact with a particular area or resource. This can involve physical barriers, electronic keycards, biometric systems, or other means to restrict entry only to authorized individuals. By controlling who can get in, access control helps to protect property, information, and individuals.

On the other hand, surveillance involves the monitoring of activities within a designated area. This can be achieved through cameras, motion sensors, or other monitoring tools. The primary aim of surveillance is to observe and record behavior, gathering evidence or alerts about unauthorized access or actions.

Thus, the correct answer highlights how access control and surveillance serve distinctly different purposes: access control focuses on restricting entry, while surveillance is concerned with monitoring what occurs once individuals are inside a monitored area. Understanding this distinction is essential for implementing effective security measures in various environments, whether physical or digital.