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

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