Describe one physical security measure a guard might enforce.

Checking identification at a restricted entrance is a vital physical security measure that guards enforce. This process involves verifying the identity of individuals attempting to gain access to sensitive or restricted areas. By ensuring that only authorized personnel enter these areas, a guard helps to maintain the integrity of security protocols and prevents unauthorized access that could lead to potential threats or breaches.

This measure not only serves to protect the physical location and its assets but also creates a secure environment for employees and visitors. By confirming that individuals have the proper identification and authorization, guards can effectively mitigate risks that arise from unvetted individuals entering secured zones.