→ The app is a bridge between the user and the device in an IoT protocol. IoT devices are integrated using IoT protocols. IoT protocols guarantee that data will be appropriately read from one device to another or even a service. Different IoT protocols have been developed and optimized for different usage scenarios.
The IoT transport layer protects data transmission as it moves between existing layers. The communication protocol improves data transfer rates; it best suits applications with data integrity requirements.
For example, Advanced Message Queuing Protocol (AMQP) provides communication between messaging software. This protocol facilitates the interoperability of many systems and applications while creating standardized messages in the industry.