Among the three basic means of security system, what is the core of security system?

Security system refers to the collection of infrastructure, technology, operation and management that uses civil air defense, physical defense, technical defense and other technical means, has the basic functions of detection, delay and response, and is used to prevent and stop illegal and criminal acts and major public security incidents, and maintain social security and stability. In the field of security, it refers to intrusion alarm system, video security monitoring security monitoring equipment system, access control system, explosion-proof security inspection system, etc. An electronic system or network consisting of security products and other related products, or composed or integrated into subsystems by these systems. security

Security mainly includes: closed-circuit monitoring system, burglar alarm system, building intercom system, parking lot management system, community card system, infrared perimeter alarm system, electronic fence, patrol system, attendance access control system, security room system, electronic examination room system, intelligent door lock, etc. Generally speaking, the basic configuration of each subsystem includes three units: front end, transmission, information processing/control/display/communication.

Security is short for security. Security is an activity to prevent and stop public security incidents such as theft, robbery and explosion. Safety precautions are mainly aimed at social order. Safety is the goal, and prevention is action. This activity can take different forms according to the specific safety needs, which can be completed by manpower, various physical facilities, technical equipment and systems, or by the combination of the two to achieve the purpose of prevention. Usually, according to the basic means to achieve prevention, security is divided into three forms: civil air defense, physical defense and technical defense.