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What is the primary function of IoT Hub?
A service that performs batch processing of IoT data
A software-as-a-service (SaaS) solution for IoT management
A service that provides bi-directional connections between IoT devices and applications
A platform for creating custom IoT devices
The correct answer is: A service that provides bi-directional connections between IoT devices and applications
The primary function of IoT Hub is to provide bi-directional connections between IoT devices and applications. This service enables secure and reliable communication, allowing devices to send telemetry data to the cloud and receive commands or updates from cloud-hosted applications. This bi-directional capability is essential for creating interactive and responsive applications that utilize data from IoT devices. IoT Hub also supports features such as device-to-cloud and cloud-to-device messaging, which is crucial for scenarios where real-time communication is necessary. This facilitates a variety of use cases, including monitoring, control, and data analytics, which are foundational aspects of building effective IoT solutions. While other options mention various IoT-related functionalities, they do not capture the core purpose of IoT Hub as accurately as the function of establishing and managing bi-directional communications between IoT devices and applications.