Microsoft Azure Fundamentals AZ-900 Practice Exam 2025 – Complete Study Resource

The correct answer indicates that IoT Hub indeed supports communication in both directions: from devices to the cloud and from the cloud to devices. This bidirectional communication is crucial for many Internet of Things (IoT) applications, allowing devices to send telemetry data to the cloud for processing and analysis, while also enabling the cloud to send commands or updates back to the devices.

In a typical IoT solution, devices may need to report their status, send operational data, or respond to cloud commands. Additionally, cloud services might need to send notifications, commands, or even configuration updates back to the devices. The flexibility offered by IoT Hub in handling this real-time communication enhances the overall efficiency and capability of IoT deployments.

While the other choices suggest limitations or a one-way communication system, they do not accurately reflect the functionalities of Azure IoT Hub, which is designed specifically to facilitate comprehensive communication within IoT ecosystems.