Give an example of a physical barrier used in access control.

A physical barrier in access control is designed to physically restrict unauthorized access to a location or area. Security gates serve this purpose effectively by providing a tangible obstruction that can be locked or controlled to manage entry and exit.

Security gates can be designed to allow or deny access based on certain criteria, such as authorized credentials or specific vehicle types. By having a formidable physical presence, security gates not only deter potential intruders but also help to enforce access policies established by an organization. This contributes to an overall security strategy where physical barriers work in conjunction with other security measures to create a more secure environment.

In contrast, alarm systems, CCTV surveillance, and access logs are important components of security management but do not physically restrict access. Alarm systems alert to intrusions, CCTV provides monitoring, and access logs record who has entered or exited an area, but none of these options provide a physical deterrence from entering a controlled space.