Answer :
The Internet of Things (IoT)) reference model provides clear definitions and descriptions for all elements and functions in the IoT systems and applications.
Level 4 of the IoT reference model, called Data Accumulation describes the data storage. This fourth level captures data and puts it at rest.So it is now usable by applications on a non-real-time basis.
Level 4 of the IoT reference model, called Data Accumulation describes the data storage. This fourth level captures data and puts it at rest.So it is now usable by applications on a non-real-time basis.