Question 185 of 997

Implement Azure security →easyMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is to enable managed identity for the Azure Function, assign it the 'Web PubSub Service Owner' role, and use the Web PubSub SDK to generate a client access token after authenticating the user. This approach works because managed identity allows the Azure Function to securely obtain an Entra ID token without storing credentials, and the SDK then uses that token to mint a scoped client access token tied to the authenticated user’s identity. On the AZ-204 exam, this scenario tests your understanding of integrating Azure Web PubSub authentication with Entra ID, specifically how to avoid shared access keys or anonymous connections when user-level security is required. A common trap is confusing the server-side access key (which bypasses Entra ID) with the role-based managed identity flow. Remember the chain: Entra ID authenticates the user, the Function’s managed identity authorizes the service, and the SDK generates the client token—think “user first, service second, token last.”

AZ-204 Implement Azure security Practice Question

This AZ-204 practice question tests your understanding of implement azure security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

You are a developer for a startup that is building a real-time chat application on Azure. The application uses Azure Web PubSub to broadcast messages to clients. The security team requires that only authenticated users can connect to the Web PubSub service. You plan to use Microsoft Entra ID for authentication. The application backend is an Azure Function that generates access tokens. What is the correct course of action to secure the Web PubSub service?

Question 1easymultiple choice

Full question →

A
Configure the Web PubSub service to use a shared access key and distribute it to clients via the Function.
Why wrong: Shared access keys are not user-specific and expose the service.
B
Enable managed identity for the Azure Function, assign it the 'Web PubSub Service Owner' role, and use the Web PubSub SDK to generate a client access token after authenticating the user.
This uses Entra ID authentication and generates a scoped token for the client.
C
Set the Web PubSub service's 'Anonymous mode' to 'Allow anonymous connections' and authenticate users at the application level.
Why wrong: Anonymous mode does not use Entra ID.
D
Use the Web PubSub connection string (access key) in the Function to generate a client token, and store the connection string in Azure Key Vault.
Why wrong: The access key is not an Entra ID token.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Enable managed identity for the Azure Function, assign it the 'Web PubSub Service Owner' role, and use the Web PubSub SDK to generate a client access token after authenticating the user.

Option A is correct. Using managed identity for the Function to get Entra ID tokens and then generating a client token with the Web PubSub SDK ensures authenticated connections. Option B is wrong because the access key does not use Entra ID. Option C is wrong because shared access keys are not tied to user identities. Option D is wrong because anonymous connections are not authenticated.

Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Configure the Web PubSub service to use a shared access key and distribute it to clients via the Function.
Why it's wrong here
Shared access keys are not user-specific and expose the service.
✓
Enable managed identity for the Azure Function, assign it the 'Web PubSub Service Owner' role, and use the Web PubSub SDK to generate a client access token after authenticating the user.
Why this is correct
This uses Entra ID authentication and generates a scoped token for the client.
Related concept
CIDR notation defines the prefix length.
✗
Set the Web PubSub service's 'Anonymous mode' to 'Allow anonymous connections' and authenticate users at the application level.
Why it's wrong here
Anonymous mode does not use Entra ID.
✗
Use the Web PubSub connection string (access key) in the Function to generate a client token, and store the connection string in Azure Key Vault.
Why it's wrong here
The access key is not an Entra ID token.

Common exam traps

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Detailed technical explanation

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.

TExam Day Tips

Write the block size before choosing the subnet.
Check whether the question asks for hosts, subnets or a specific address range.
Do not confuse /24, /25, /26 and /27 host counts.

Key takeaway

Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Real-world example

How this comes up in practice

A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

What to study next

Got this wrong? Here's your next step.

Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-204 subnetting questions on CIDR, address ranges, and subnet selection.

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FAQ

Questions learners often ask

What does this AZ-204 question test?

Implement Azure security — This question tests Implement Azure security — CIDR notation defines the prefix length..

What is the correct answer to this question?

The correct answer is: Enable managed identity for the Azure Function, assign it the 'Web PubSub Service Owner' role, and use the Web PubSub SDK to generate a client access token after authenticating the user. — Option A is correct. Using managed identity for the Function to get Entra ID tokens and then generating a client token with the Web PubSub SDK ensures authenticated connections. Option B is wrong because the access key does not use Entra ID. Option C is wrong because shared access keys are not tied to user identities. Option D is wrong because anonymous connections are not authenticated.

What should I do if I get this AZ-204 question wrong?

What is the key concept behind this question?

CIDR notation defines the prefix length.

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Last reviewed: Jun 20, 2026

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