You are building an industrial IoT solution for a manufacturing plant equipped with a number of “legacy” field devices which can't use any of the protocols supported by the IoT hub, therefore they can't be connected directly to the IoT hub and the end-devices don't need to be registered in the IoT hub.
Azure Edge provides the necessary functionality you can use to build the appropriate solution.
Which type of solution should you use?
Click on the arrows to vote for the correct answer
A. B. C. D.Correct Answer: B.
Option A is incorrect because while a Translation gateway must be used, it is clearly stated that the devices don't need to be registered to the IoT hub, Identity translation is not the right option.
Option B is CORRECT because the Protocol Translation gateway is the only solution which can communicate with the downstream devices using industrial protocols and can forward their telemetry data to the IoT hub through a single channel, without requiring each device to have an IoT hub identity.
Option C is incorrect because Transparent gateway can be used in cases where the devices can connect via either MQTT or AMQP protocols.
The gateway is “transparent” because it simply passes communications between the devices and IoT Hub.
Option D is incorrect because only the Protocol translation is suitable for this particular use case.
Reference:
Given the scenario, where legacy field devices cannot use any of the protocols supported by the IoT hub, Azure IoT Edge can be used to provide the necessary functionality to build the appropriate solution.
Azure IoT Edge is a fully managed service that enables deployment of cloud workloads to run on IoT devices at the edge. Azure IoT Edge provides an extensible platform for developing and deploying modules that enable the processing of data on the edge devices.
Answering the question, the type of solution that should be used is the Protocol translation gateway, which is option B.
A Protocol translation gateway is a type of gateway that provides the translation of protocols between the devices and the cloud, enabling devices with legacy protocols to communicate with the IoT hub. The protocol translation gateway can be used to convert legacy protocols into a protocol that is supported by the IoT hub.
On the other hand, Identity translation gateway, which is option A, provides the ability to map device identities and credentials to a different identity or set of credentials, enabling devices with different identities to communicate with each other.
Option C, Transparent gateway, refers to a type of gateway that acts as a bridge between different networks, enabling devices on different networks to communicate with each other without the need for changes to their network settings.
Therefore, based on the scenario given, Protocol translation gateway is the best option to be used to enable legacy field devices to communicate with the IoT hub.