What component of the IoT Edge runtime manages communications between modules on the device?

The IoT Edge hub is responsible for managing communications between the different modules running on an IoT Edge device. It acts as a central point for connecting these modules, facilitating both intra-module communication and communication with the cloud. The hub enables modules to send messages to each other, share information, and coordinate actions seamlessly.

Moreover, the IoT Edge hub integrates with cloud services, allowing modules to receive commands and updates from the cloud and send telemetry data back. This capability is crucial for creating a cohesive and well-functioning IoT solution where edge modules can collaborate effectively and interact with external resources.

In contrast, the IoT Edge agent primarily handles the overall lifecycle management of the modules, including deployment, monitoring, and updating them. The IoT Edge security daemon focuses on securing communications and managing cryptographic keys, while the IoT Edge monitor is used for tracking the performance and status of the IoT Edge device itself. None of these components handle communication between the modules directly, which is why the IoT Edge hub is the correct answer.