setting up IP cameras to monitor key infrastructure. Physical access control protects buildings, rooms, racks, closets, and other infrastructure locations from unauthorized physical access. IP cameras monitoring key infrastructure are a physical security control because they deter, detect, and document physical access to sensitive areas. Console passwords and enable passwords are logical access controls on network devices, not physical controls. Backing up syslog data is an operational logging practice. Cisco CCNA 200-301 v1.1 Security Fundamentals separates administrative, technical, and physical controls because network security is not limited to packet filtering. A router in a locked cabinet is safer than one exposed in a public space, and surveillance is part of enforcing that physical boundary. The correct answer is setting up IP cameras to monitor key infrastructure.