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Microsoft AZ-220 Certification Exam Practice Questions – Part 5

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Microsoft AZ-220 Certification: Microsoft Azure IoT Developer Certification Exam Practice Questions and Answers

Question -28

You have an Azure IoT hub that is being taken from prototype to production.
You plan to connect IoT devices to the IoT hub. The devices have hardware security modules (HSMs).
You need to use the most secure authentication method between the devices and the IoT hub. Company policy prohibits the use of internally generated certificates.
Which authentication method should you use?

  • A. an X.509 self-signed certificate
  • B. a certificate thumbprint
  • C. a symmetric key
  • D. An X.509 certificate signed by a root certification authority (CA).

Correct Answer: D
Purchase X.509 certificates from a root certificate authority (CA). This method is recommended for production environments.
The hardware security module, or HSM, is used for secure, hardware-based storage of device secrets, and is the most secure form of secret storage. Both X.509 certificates and SAS tokens can be stored in the HSM
Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/concepts-security

Question -29

You use Azure Security Center in an Azure IoT solution.
You need to exclude some security events. The solution must minimize development effort.
What should you do?

  • A. Create an Azure function to filter security messages.
  • B. Add a configuration to the code of the physical IoT device.
  • C. Add configuration details to the device twin object.
  • D. Create an azureiotsecurity module twin and add configuration details to the module twin object.

Correct Answer: D
Properties related to every Azure Security Center for IoT security agent are located in the agent configuration object, within the desired properties section, of the azureiotsecurity module.
To modify the configuration, create and modify this object inside the azureiotsecurity module twin identity.
Note: Azure Security Center for IoT’s security agent twin configuration object is a JSON format object. The configuration object is a set of controllable properties that you can define to control the behavior of the agent.
These configurations help you customize the agent for each scenario required. For example, automatically excluding some events, or keeping power consumption to a minimal level are possible by configuring these properties.
Reference:
https://docs.microsoft.com/en-us/azure/asc-for-iot/how-to-agent-configuration

Question -30

You have an Azure IoT hub that uses a Device Provisioning Service instance.

You have 1,000 legacy IoT devices that only support MAC address or serial number identities. The device do NOT have a security feature that can be used to securely identify the device or a hardware security module (HSM).
You plan to deploy the devices to a secure environment.
You need to configure the Device Provisioning Service instance to ensure that all the devices are identified securely before they receive updates.
Which attestation mechanism should you choose?

  • A. Trusted Platform Module (TPM) 1.2 attestation
  • B. symmetric key attestation
  • C. X.509 certificates

Correct Answer: B
A common problem with many legacy devices is that they often have an identity that is composed of a single piece of information. This identity information is usually a MAC address or a serial number. Legacy devices may not have a certificate, TPM, or any other security feature that can be used to securely identify the device. The Device Provisioning Service for IoT hub includes symmetric key attestation. Symmetric key attestation can be used to identify a device based off information like the MAC address or a serial number.
Reference:
https://docs.microsoft.com/bs-latn-ba/azure/iot-dps/how-to-legacy-device-symm-key

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Microsoft AZ-220 Certification Exam Practice Questions and Answers – Part 1

Sample Exam Questions 6: AZ-300: Microsoft Azure Architect Technologies

Sample Exam Questions 5: AZ-300: Microsoft Azure Architect Technologies


Microsoft Exam AZ-220 Tags:IoT Edge devices, IoT Hub, IoT Hub REST API, Microsoft, Microsoft Azure, Microsoft Azure IoT Developer, Microsoft Exam AZ-220

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