Which three communication protocols can you use?

You have an existing Azure IoT hub.

You need to connect physical IoT devices to the IoT hub.

You are connecting the devices through a firewall that allows only port 443 and port 80.

Which three communication protocols can you use? Each correct answer presents a

complete solution. NOTE: Each correct selection is worth one point.
A . MQTT over WebSocket
B. AMQP
C. AMQP over WebSocket
D. MQTT
E. HTTPS

Answer: A,C,E

Explanation:

MQTT over WebSockets, AMQP over WebSocket, and HTTPS use port 443.

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