- A
Use function-level authorization keys (function or admin keys) for all HTTP triggers.
Why wrong: Keys can be compromised and are less secure than Entra ID.
- B
Enable App Service Authentication and configure Microsoft Entra ID as the identity provider.
This ensures only authenticated users can invoke the function.
- C
Store connection strings and secrets in Azure Key Vault and reference them from the function app settings using Key Vault references.
This prevents secrets from being stored in plaintext.
- D
Set the function app's public access to 'Off' and use virtual network integration.
Why wrong: This would block all HTTP triggers.
- E
Enable Cross-Origin Resource Sharing (CORS) with allowed origins set to '*'.
Why wrong: CORS is for browser security, not authentication.
Quick Answer
The correct answer is to enable App Service Authentication with Microsoft Entra ID and store secrets using Azure Key Vault references. These two actions secure an HTTP trigger Azure Function by ensuring only authenticated, authorized users can invoke the endpoint while keeping connection strings and secrets out of plaintext configuration files. On the AZ-204 exam, this scenario tests your understanding of defense-in-depth for serverless APIs, where Entra ID replaces weaker function-level keys and Key Vault references eliminate hardcoded secrets. A common trap is confusing CORS or public access settings with authentication—CORS controls browser cross-origin requests, not user identity. Remember the mnemonic: “Entra locks the door, Key Vault hides the key.”
AZ-204 Implement Azure security Practice Question
This AZ-204 practice question tests your understanding of implement azure security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO actions should you take to secure an Azure Function app that is triggered by an HTTP request? (Choose two.)
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 App Service Authentication and configure Microsoft Entra ID as the identity provider.
Options A and C are correct. Enabling App Service Authentication with Microsoft Entra ID ensures only authenticated users can call the function. Using Azure Key Vault references for secrets prevents secrets from being stored in plaintext in configuration. Option B is wrong because function-level authorization keys are less secure than Entra ID. Option D is wrong because public access is not a security feature. Option E is wrong because enabling CORS does not authenticate users.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use function-level authorization keys (function or admin keys) for all HTTP triggers.
Why it's wrong here
Keys can be compromised and are less secure than Entra ID.
- ✓
Enable App Service Authentication and configure Microsoft Entra ID as the identity provider.
Why this is correct
This ensures only authenticated users can invoke the function.
Related concept
Authentication checks who the user is.
- ✓
Store connection strings and secrets in Azure Key Vault and reference them from the function app settings using Key Vault references.
Why this is correct
This prevents secrets from being stored in plaintext.
Related concept
Authentication checks who the user is.
- ✗
Set the function app's public access to 'Off' and use virtual network integration.
Why it's wrong here
This would block all HTTP triggers.
- ✗
Enable Cross-Origin Resource Sharing (CORS) with allowed origins set to '*'.
Why it's wrong here
CORS is for browser security, not authentication.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related AZ-204 questions on access control and AAA configuration.
- →
Implement Azure security — study guide chapter
Learn the concepts, then practise the questions
- →
Implement Azure security practice questions
Targeted practice on this topic area only
- →
All AZ-204 questions
997 questions across all exam domains
- →
Microsoft Azure Developer Associate AZ-204 study guide
Full concept coverage aligned to exam objectives
- →
AZ-204 practice test guide
How to use practice tests most effectively before exam day
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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 — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Enable App Service Authentication and configure Microsoft Entra ID as the identity provider. — Options A and C are correct. Enabling App Service Authentication with Microsoft Entra ID ensures only authenticated users can call the function. Using Azure Key Vault references for secrets prevents secrets from being stored in plaintext in configuration. Option B is wrong because function-level authorization keys are less secure than Entra ID. Option D is wrong because public access is not a security feature. Option E is wrong because enabling CORS does not authenticate users.
What should I do if I get this AZ-204 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related AZ-204 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 20, 2026
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
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