The document discusses several trends in physical security systems moving from analog to IP-based networks:
1) More surveillance cameras, access controls, and sensors are connecting to IP networks which allows for features like priority tagging, automatic device discovery, and network access control.
2) HD video and video analytics software are improving surveillance capabilities like facial recognition while reducing bandwidth needs.
3) Building access controls are integrating with IP networks to automate policies and incident response.
4) Open standards are promoting interoperability between physical security systems and other communication technologies.