What should you do first?

You have an Azure IoT hub that receives messages from an IoT device. The messages are serialized as Protobuf.

You need the IoT hub to route the messages.

What should you do first?
A . From the Azure portal, add desired properties to the device twin.
B . Configure the loT device to add application properties to the messages.
C . From the Azure portal, configure the loT hub to add message enrichments.
D . Configure the loT device to add ASCII-encoded properties to the body of the messages.

Answer: A

Explanation:

Device twins store device-related information that:

Device and back ends can use to synchronize device conditions and configuration.

The solution back end can use to query and target long-running operations.

Desired properties. Used along with reported properties to synchronize device configuration or conditions. The solution back end can set desired properties, and the device app can read them. The device app can also receive notifications of changes in the desired properties.

Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins