Table 2.

Prominent IoT architectures.

Author	Description
Bauer et al. [32]	IoT-A. An amalgamation of different IoT perspectives.
Atzori et al. [33]	The author has presented a SocialIoT-architecture based on the integration of IoT with the social networking concept.
Qin et al. [34]	The author presents SDN-based architecture for provisioning IoT with better quality-of-service, deployment, scalability, and context awareness.
Li et al. [35]	Mobility first (future internet architecture) mainly addresses the challenges concerning the usage of mobile phones as gateways and dealing with the security aspect of sensor data.
Singh et al. [36]	JDL (joint director of labs) based model for IoT architecture with the combination of semantic layer.
Cecchinel et al. [37]	Software architecture for collection of sensor-based data with cloud-based storage (sensor, sensor board, bridges, middleware)
Kraijak et al. [38]	5-layer architecture (perception, network, middleware, application, business)
Ray et al. [39]	It describes major IoT functional elements with multiple IoT architectures in different application areas.