Which shared access policy should you use?

Topic 3, Fabrikam New

Case study

General overview

Fabrikam, Inc. is an international food company that has a main office in London and 250 sites worldwide.

FabRIkam uses a prototype hydroponics loT management system that tracks temperatures and PH levels and adjusts conditions automatically.

Location

The prototype environment is deployed to the main office.

IoT Hub

The management system uses a free tier Azure loT hub.

Devices

The prototype contains the devices shown in the following table.

Each device will use the following:

• A common set of Azure loT Edge modules

• A unique module for each type of sensor or controller

Each device has a device twin. Each device twin contains a tag that identifies the device type. For example, the device twin of Child4 contains a tag of ph. Each device sends 1.440 4-KB messages to the loT hub per day.

Pilot deployment

A pilot of the hydroponics loT management system will be deployed initially to 50 of the company’s worldwide sites.

Device Requirements

Fabrikam identifies the following device requirements:

• Cloud-to-device commands will be sent to each primary control device.

• All module communication from the child devices must be routed to the loT hub.

• The parameters of each device type must be configured in the loT Edge container configuration file.

• Device modules must be deployed to all the devices automatically, and then updated automatically. The solution must support targeted deployments by using device twin tags.

Networking Requirements

Fabrikam identifies the following networking requirements:

• Child devices will NOT have internet access.

• The primary control device in each site will have internet access.

• Child devices will communicate with their local primary control device by using the AMQP protocol.

Monitoring Requirements

Fabrikam identifies the following monitoring requirements:

• The number of device-to-cloud telemetry messages sent to the loT hub by the primary control devices must be tracked.

• An email notification must be sent if a message is NOT received from Child4 every 10 minutes.

Technical Requirements

Fabrikam identifies the following technical requirements:

• The solution must support cloud-to-device commands.

• Administrative effort must be minimized whenever possible.

• Hardware and software costs must be minimized whenever possible.

• Access to the loT hub must be restricted to devices that connect from the company’s sites.

You need to develop a messaging app that meets the technical requirements.

Which shared access policy should you use?
A . service
B. device
C. lothubowner
D. registryReadWrite

View Answer

Answer: A