7.1.7 Compare a centrally controlled system with a distributed system.
Centrally controlled system - A hardware and/or software IT system in which all parts of it are controlled by a central controller/server/mainframe.
Distributed system - A hardware and/or software IT system in which various parts of the control and/or processing are controlled by individual controllers/servers/computers throughout the system.
Centrally controlled system
Advantages - Easy to control
Disadvantages - If the controller is damaged the whole system will stop working, the system will be overloaded
Distributed system
Advantages - If one part is broken down the system will continue working
Disadvantages - Data loss can happen because the parts of the system will have to share the data with other parts, finding errors in the system will be much harder