Applications and use cases include utility, military, financial, and end-user interoperability.
IOT has new protocol stacks that help device manufacturers create and cooperate. This includes:
MQTT (Message Queuing Telemetry Transport), CoAP, AMQP, DDS, HTTP, WebSocket, WiFi, and Bluetooth.

CoAP works like HTTP with minimal overhead and multicasting. Due to application overhead and processing requirements, native HTTP won’t operate on IOT devices.
Data Distribution Service (DDS), like CoAp, provides the application layer for embedded systems to communicate with IOT devices. This protocol is for low-power devices.
What is the next generation IOT security framework?
How does blockchain affect the privacy and security of IoT?
Is an IOT device the new endpoint for the enterprise?