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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.
Correct Answer: A,C,E
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