The document provides several examples of access control from different authors' experiences:
1) Access cards, biometrics, usernames/passwords, and RADIUS are mentioned as common examples of access control for physical and network access.
2) Biometric systems, mechanical locks, and passive infrared request-to-exit devices are described as specific access control methods.
3) Building access control using ID cards, private document permissions, and shared server file access are outlined.
Related topics: