AZ-220 Q&A: Implement multi-factor device authentication by using custom device authentication.

Question

You have an Azure IoT solution.

You need to implement multi-factor device authentication by using custom device authentication.

What should you do first?

A. Create an Azure Policy definition for Azure IoT Hub.
B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.
C. Create a service endpoint policy.
D. Deploy a security token service.

Answer

B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Explanation 1

The correct answer is B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Multi-factor authentication (MFA) is a security process that requires users to provide two or more pieces of evidence to verify their identity. This makes it much more difficult for attackers to gain access to your resources, even if they have your password.
Azure Active Directory (Azure AD) is a cloud-based identity and access management (IAM) service that provides MFA for your Azure resources.
Custom device authentication is a feature of Azure IoT Hub that allows you to implement your own authentication scheme for your IoT devices.

In order to implement multi-factor device authentication by using custom device authentication, you first need to enable MFA for Azure AD. Once you have enabled MFA for Azure AD, you can then configure custom device authentication for your Azure IoT Hub.

The other options are incorrect for the following reasons:

Option A creates an Azure Policy definition for Azure IoT Hub. However, this option does not enable MFA for Azure AD.
Option C creates a service endpoint policy. However, this option is not related to MFA.
Option D deploys a security token service. However, this option is also not related to MFA.

Therefore, the only option that you need to do first in order to implement multi-factor device authentication by using custom device authentication is B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Explanation 2

To implement multi-factor device authentication by using custom device authentication, you should first create a service endpoint policy. A service endpoint policy allows you to specify which devices can connect to your IoT hub based on their authentication type and other properties. You can use a service endpoint policy to require devices to use X.509 certificates, which are a type of digital identity that is standardized and secure. You can also use a service endpoint policy to filter devices by their device ID, model ID, or DPS enrollment group.

To create a service endpoint policy, you need to use the Azure CLI or the Azure IoT Hub REST API. You cannot create a service endpoint policy in the Azure portal. You can find the steps to create a service endpoint policy in this document.

The other options are not correct because:

Creating an Azure Policy definition for Azure IoT Hub is not related to device authentication. Azure Policy is a service that helps you enforce organizational standards and assess compliance at scale.
Enabling multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD) is not applicable to custom device authentication. MFA is a feature that adds an extra layer of security to your Azure AD account by requiring you to verify your identity with a phone call, text message, or app notification.
Deploying a security token service is not necessary for custom device authentication. A security token service is a software component that issues security tokens, such as SAS tokens or JWT tokens, that can be used to authenticate devices or users. However, you can use X.509 certificates instead of security tokens for custom device authentication.

Explanation 3

To implement multi-factor device authentication by using custom device authentication in an Azure IoT solution, you should first deploy a security token service. This is because a security token service (STS) is responsible for issuing security tokens that are used to authenticate devices. The STS can be implemented as a custom service or by using an existing STS such as Azure Active Directory (Azure AD).

Explanation 4

The correct answer is B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Multi-factor authentication (MFA) is a security feature that requires users to provide two or more pieces of evidence to authenticate themselves. This helps to protect your Azure IoT solution from unauthorized access.

To implement MFA for custom device authentication, you first need to enable MFA for Azure AD. Once MFA is enabled, you can create a custom device authentication policy that requires devices to use MFA to connect to your Azure IoT Hub.

The other options are incorrect for the following reasons:

Option A creates an Azure Policy definition for Azure IoT Hub. However, this option does not enable MFA for Azure AD.
Option C creates a service endpoint policy. However, this option does not enable MFA for Azure AD.
Option D deploys a security token service. However, this option does not enable MFA for Azure AD.

Therefore, the only option that will correctly implement MFA for custom device authentication is B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Here are the steps on how to enable MFA for Azure AD:

In the Azure portal, go to the Azure Active Directory blade.
In the left navigation, select Security.
In the Multi-factor authentication section, select Enable.
Follow the instructions to enable MFA for your users.

Once MFA is enabled, you can create a custom device authentication policy that requires devices to use MFA to connect to your Azure IoT Hub. Here are the steps on how to do this:

In the Azure portal, go to the Azure IoT Hub blade.
In the left navigation, select Device Authentication.
In the Custom device authentication section, select Create policy.
In the Policy name field, enter a name for your policy.
In the Policy definition section, select Require MFA.
Select Save.

Your custom device authentication policy will now require devices to use MFA to connect to your Azure IoT Hub.

Explanation 5

To implement multi-factor device authentication by using custom device authentication in Azure IoT solution, you should first create an Azure Policy definition for Azure IoT Hub. This policy definition will define the custom device authentication method that you want to use. You can then assign this policy definition to your IoT hub to enforce the custom device authentication method for all devices that connect to your IoT hub.

Explanation 6

The correct answer is D. Deploy a security token service.

Here is a detailed explanation:

A security token service is a service that issues security tokens that can be used to authenticate devices to an Azure IoT hub.
Custom device authentication is a feature that allows devices to use any type of authentication mechanism, such as multi-factor authentication, by using a security token service.
This solution meets the requirements because it allows the company to implement multi-factor device authentication by using a security token service that can issue tokens based on any criteria, such as device ID, password, PIN, biometrics, etc.
The first step to use custom device authentication is to deploy a security token service that can communicate with the Azure IoT hub and the devices.

The other options are incorrect because:

A. An Azure Policy definition for Azure IoT Hub is a way to enforce rules and effects for IoT hub resources, such as naming conventions, tags, locations, etc. It is not related to device authentication.
B. Multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD) is a way to verify the identity of users who sign in to Azure services, such as the Azure portal, by using a second factor, such as phone call, text message, or mobile app notification. It is not related to device authentication.
C. A service endpoint policy is a way to restrict access to Azure services from virtual networks by using service tags. It is not related to device authentication.

Explanation 7

The correct answer is B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Multi-factor authentication (MFA) is a security process that requires users to provide two or more pieces of evidence to verify their identity. This can include something they know, something they have, or something they are.
Azure AD is a cloud-based identity and access management (IAM) service that provides a single sign-on (SSO) solution for users and devices.
Custom device authentication is a feature of Azure IoT Hub that allows you to define your own authentication process for devices.

To implement multi-factor device authentication by using custom device authentication, you must first enable MFA for Azure AD. Once MFA is enabled, you can then create a custom device authentication policy in Azure IoT Hub. This policy will define the specific MFA requirements for your devices.

The other options are incorrect for the following reasons:

Option A creates an Azure Policy definition for Azure IoT Hub. However, this option does not enable MFA for Azure AD.
Option C creates a service endpoint policy. However, this option is not used to configure MFA for devices.
Option D deploys a security token service. However, this option is not required to implement multi-factor device authentication.

Therefore, the only option that you must do first to implement multi-factor device authentication by using custom device authentication is B. Enable multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), part of Microsoft Entra.

Explanation 8

The correct answer is D. Deploy a security token service.

Here’s why:

In an Azure IoT solution, multi-factor device authentication can be implemented using custom device authentication. This involves using a security token service (STS) to issue security tokens for devices.

A security token service is a software-based identity provider that issues security tokens as part of a claims-based identity system. In the context of Azure IoT, the STS would issue tokens to devices, which they would then use to authenticate themselves to the IoT Hub.

Once the STS is deployed, it can be integrated with the Azure IoT solution to provide multi-factor authentication for devices. The devices would first authenticate themselves to the STS, which would then issue them a security token. The devices would then present this token to the IoT Hub to authenticate themselves.

Options A, B, and C are incorrect because they do not directly relate to implementing multi-factor device authentication in an Azure IoT solution.

Option A, creating an Azure Policy definition for Azure IoT Hub, is used for enforcing organizational standards and assessing compliance at scale, not for device authentication.

Option B, enabling multi-factor authentication for Azure Active Directory, is used for user authentication, not device authentication.

Option C, creating a service endpoint policy, is used for controlling network traffic to service endpoints, not for device authentication.

Explanation 9

To implement multi-factor device authentication by using custom device authentication in an Azure IoT solution, the first step is to create a service endpoint policy. Therefore, the correct answer is option (C).

Here’s why:

Custom device authentication allows you to use your own device credentials for authentication instead of relying on the device credentials generated by Azure IoT Hub. This gives you more flexibility in how you authenticate your devices and allows you to implement multi-factor device authentication.

A service endpoint policy is used to restrict access to an Azure service to a specific virtual network or set of virtual networks. By creating a service endpoint policy for Azure IoT Hub, you can restrict access to the IoT Hub to a specific set of virtual networks, which helps improve security.

To implement multi-factor device authentication using custom device authentication, you first need to create a service endpoint policy that restricts access to your IoT Hub to a specific set of virtual networks. Once you have done this, you can then configure your devices to use custom device authentication to authenticate with the IoT Hub.

Therefore, option (C) is the correct answer that you need to do first to implement multi-factor device authentication by using custom device authentication in an Azure IoT solution.

Explanation 10

To implement multi-factor device authentication using custom device authentication in Azure IoT, the first step is to create an Azure Policy definition for Azure IoT Hub. This policy definition will allow you to define the required conditions for multi-factor device authentication. Once the policy is created, you can then apply it to your Azure IoT Hub to enforce the multi-factor device authentication. It is important to note that this is just the first step, and there are additional steps involved in implementing and configuring multi-factor device authentication in Azure IoT. This includes configuring the custom device authentication and setting up the required security measures for authentication. To pass the Microsoft Azure IoT Developer AZ-220 certification exam, candidates should have a deep understanding of Azure services, data storage, analysis, and AI. They also need to be able to program in at least one supported language and implement designs for IoT solutions, including connectivity, diagnostics, and monitoring.

Explanation11

To implement multi-factor device authentication using custom device authentication in an Azure IoT solution, the first step you should take is option A: Create an Azure Policy definition for Azure IoT Hub.

Here’s a detailed explanation for why this option is the correct choice:

Azure Policy is a service in Azure that enables you to create, assign, and manage policies to enforce compliance with organizational standards and requirements. It helps you ensure that your resources, such as Azure IoT Hub, are deployed and configured correctly according to your organization’s guidelines.
Custom device authentication allows you to implement your own authentication mechanism for devices connecting to Azure IoT Hub. This enables you to have control over the authentication process and implement additional security measures, such as multi-factor authentication.
By creating an Azure Policy definition for Azure IoT Hub, you can define and enforce specific requirements for device authentication. This policy definition will outline the rules and criteria for multi-factor device authentication using custom device authentication.
Once the Azure Policy definition is created, you can assign it to your Azure IoT Hub to ensure that all devices connecting to the hub follow the defined authentication requirements.

Option B, enabling multi-factor authentication (MFA) for Microsoft Azure Active Directory (Azure AD), is not directly related to implementing multi-factor device authentication in an Azure IoT solution. MFA for Azure AD is focused on user authentication rather than device authentication.

Option C, creating a service endpoint policy, is not specifically related to implementing multi-factor device authentication. Service endpoint policies are used to control access to Azure services through virtual network service endpoints.

Option D, deploying a security token service, is not the first step in implementing multi-factor device authentication. A security token service (STS) is used to issue security tokens for authentication purposes, but it is not directly related to custom device authentication or Azure IoT Hub.

Therefore, the correct first step to implement multi-factor device authentication using custom device authentication in an Azure IoT solution is to create an Azure Policy definition for Azure IoT Hub (option A).

Explanation 12

The correct answer is D. Deploy a security token service.

To implement multi-factor device authentication by using custom device authentication, you need to follow these steps:

Deploy a security token service that can issue and validate tokens for your devices. This service can be hosted on Azure or on-premises, and it can use any authentication method that you choose, such as certificates, biometrics, or PINs.
Register your security token service with Azure IoT Hub by using the Device Provisioning Service (DPS). You need to provide the URL of your service and a certificate that establishes a trust relationship between your service and DPS.
Configure your devices to obtain tokens from your security token service and send them to DPS during the provisioning process. DPS will validate the tokens by calling your service and assign the devices to the appropriate IoT hub.
Configure your IoT hub to accept tokens from your devices during normal operation. You need to enable custom authentication on your IoT hub and specify the URL of your security token service.

Therefore, the first step is to deploy a security token service that can issue and validate tokens for your devices.

Reference

Microsoft Azure IoT Developer AZ-220 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Microsoft Azure IoT Developer AZ-220 exam and earn Microsoft Azure IoT Developer AZ-220 certification.

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