Which DFD symbol represents data output from sensing, actuating, traffic forwarding, analysis, and control systems?
- external entity
- data flow
- data store
- process
Explanation: DFDs use a series of four symbols:
External entity - users, contractors, and partners outside of the control of the system that send or receive data
Process - data output from sensing, actuating, traffic forwarding, analysis, and control systems
Data store - data at rest in local, fog, cloud, or data center storage
Data flow - single headed arrows that indicate uni-directional data flow; double headed arrows that indicate bi-directional data flow
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