added links to protocol table and a couple of examples

Author: JimacoMS3

articles/iot-hub/iot-hub-mqtt-support.md

@@ -28,7 +28,7 @@ A device can use the MQTT protocol to connect to an IoT hub using any of the fol
 * Libraries in the [Azure IoT SDKs](https://github.com/Azure/azure-iot-sdks).
 * The MQTT protocol directly.
 
-The MQTT port (8883) is blocked in many corporate and educational networking environments. If you can't open port 8883 in your firewall, we recommend using MQTT over Web Sockets. MQTT over Web Sockets communicates over port 443, which is almost always open in networking environments. To learn how to specify the MQTT protocol when using the Azure IoT SDKs, see [Using the device SDKs](#using-the-device-sdks).
+The MQTT port (8883) is blocked in many corporate and educational networking environments. If you can't open port 8883 in your firewall, we recommend using MQTT over Web Sockets. MQTT over Web Sockets communicates over port 443, which is almost always open in networking environments. To learn how to specify the MQTT and MQTT over Web Sockets protocols when using the Azure IoT SDKs, see [Using the device SDKs](#using-the-device-sdks).
 
 ## Using the device SDKs
 
@@ -41,11 +41,26 @@ The following table contains links to code samples for each supported language a
 | Language | MQTT protocol parameter | MQTT over Web Sockets protocol parameter
 | --- | --- | --- |
 | [Node.js](https://github.com/Azure/azure-iot-sdk-node/blob/master/device/samples/simple_sample_device.js) | azure-iot-device-mqtt.Mqtt | azure-iot-device-mqtt.MqttWs |
-| [Java](https://github.com/Azure/azure-iot-sdk-java/blob/master/device/iot-device-samples/send-receive-sample/src/main/java/samples/com/microsoft/azure/sdk/iot/SendReceive.java) |IotHubClientProtocol.MQTT | IotHubClientProtocol.MQTT_WS |
-| [C](https://github.com/Azure/azure-iot-sdk-c/tree/master/iothub_client/samples/iothub_client_sample_mqtt_dm) | MQTT_Protocol | MQTT_WebSocket_Protocol |
-| [C#](https://github.com/Azure/azure-iot-sdk-csharp/tree/master/iothub/device/samples) | TransportType.Mqtt | TransportType.Mqtt falls back to MQTT over Web Sockets if MQTT fails. To specify MQTT over Web Sockets only, use TransportType.Mqtt_WebSocket_Only |
+| [Java](https://github.com/Azure/azure-iot-sdk-java/blob/master/device/iot-device-samples/send-receive-sample/src/main/java/samples/com/microsoft/azure/sdk/iot/SendReceive.java) |[IotHubClientProtocol](https://docs.microsoft.com/java/api/com.microsoft.azure.sdk.iot.device.iothubclientprotocol?view=azure-java-stable).MQTT | IotHubClientProtocol.MQTT_WS |
+| [C](https://github.com/Azure/azure-iot-sdk-c/tree/master/iothub_client/samples/iothub_client_sample_mqtt_dm) | [MQTT_Protocol](https://docs.microsoft.com/azure/iot-hub/iot-c-sdk-ref/iothubtransportmqtt-h/mqtt-protocol) | [MQTT_WebSocket_Protocol](https://docs.microsoft.com/azure/iot-hub/iot-c-sdk-ref/iothubtransportmqtt-websockets-h/mqtt-websocket-protocol) |
+| [C#](https://github.com/Azure/azure-iot-sdk-csharp/tree/master/iothub/device/samples) | [TransportType](https://docs.microsoft.com/dotnet/api/microsoft.azure.devices.client.transporttype?view=azure-dotnet).Mqtt | TransportType.Mqtt falls back to MQTT over Web Sockets if MQTT fails. To specify MQTT over Web Sockets only, use TransportType.Mqtt_WebSocket_Only |
 | [Python](https://github.com/Azure/azure-iot-sdk-python/tree/master/azure-iot-device/samples) | Supports MQTT by default | Add `websockets=True` in the call to create the client |
 
+The following fragment shows how to specify the MQTT over Web Sockets protocol when using the Azure IoT Node.js SDK:
+
+```javascript
+var Client = require('azure-iot-device').Client;
+var Protocol = require('azure-iot-device-mqtt').MqttWs;
+var client = Client.fromConnectionString(deviceConnectionString, Protocol);
+```
+
+The following fragment shows how to specify the MQTT over Web Sockets protocol when using the Azure IoT Python SDK:
+
+```python
+from azure.iot.device.aio import IoTHubDeviceClient
+device_client = IoTHubDeviceClient.create_from_connection_string(deviceConnectionString, websockets=True)
+```
+
 ### Default keep-alive timeout
 
 In order to ensure a client/IoT Hub connection stays alive, both the service and the client regularly send a *keep-alive* ping to each other. The client using IoT SDK sends a keep-alive at the interval defined in this table below: