What should you do to identify the cause of the connectivity issues?

What should you do to identify the cause of the connectivity issues?
A . Send cloud-to-device messages to the IoT devices.
B . Use the heartbeat pattern to send messages from the IoT devices to iothub1.
C . Monitor the connection status of the device twin by using an Azure function.
D . Enable the collection of the Connections diagnostics logs and set up alerts for the connected devices count metric.

Answer: D

Explanation:

Scenario: You discover connectivity issues between the IoT gateway devices and iothub1, which cause IoT devices to lose connectivity and messages.

To log device connection events and errors, turn on diagnostics for IoT Hub. We

recommend turning on these logs as early as possible, because if diagnostic logs aren’t

enabled, when device disconnects occur, you won’t have any information to troubleshoot

the problem with.

Step 1: