While cybersecurity often emphasizes digital threats, physical security controls are just as vital, forming the first line of defense against unauthorized access to systems, data centers, and critical infrastructure. This episode explores physical security measures such as access control vestibules, security guards, fencing, bollards, surveillance systems, and lighting—all designed to deter, detect, and delay unauthorized individuals from breaching secure areas. We also discuss how physical controls complement digital safeguards by protecting hardware, enforcing policy boundaries, and ensuring the environmental stability needed for digital operations to function reliably. Implementation strategies must consider cost, facility layout, integration with electronic systems, and response capabilities. Physical controls may be low-tech compared to firewalls and encryption, but they are fundamental to protecting high-value assets from theft, sabotage, and physical tampering.