The correct answer is to configure network restrictions to allow only specific IP ranges and enable App Service Authentication (Easy Auth). These two actions work together to secure Azure Functions HTTP triggers by reducing the attack surface: network restrictions block unauthorized traffic at the infrastructure level, while Easy Auth offloads authentication to Azure, ensuring only authenticated users can invoke the function. On the Microsoft Cybersecurity Architect exam, this scenario tests your understanding of defense-in-depth for serverless compute—a common trap is confusing function keys with comprehensive security, since keys only provide basic shared-secret auth, not identity-based access. Remember the memory tip: “Lock the door and check the ID”—network restrictions lock the door to your function, and Easy Auth checks each caller’s identity, leaving no gap for anonymous or key-only access.
SC-100 Practice Question: Design security solutions for applications and data
This SC-100 practice question tests your understanding of design security solutions for applications and data. 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.
Which TWO actions should you take to secure Azure Functions with HTTP triggers?
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 (EasyAuth)
Options A and D are correct. Using easy auth (App Service Authentication) and restricting network access reduce attack surface. Option B is wrong because anonymous access is insecure. Option C is wrong because function keys only provide basic auth, not comprehensive security. Option E is wrong because Application Insights is for monitoring, not security.
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.
✓
Enable App Service Authentication (EasyAuth)
Why this is correct
EasyAuth integrates with identity providers to authenticate requests.
Related concept
Authentication checks who the user is.
✓
Configure network restrictions to allow only specific IP ranges
Why this is correct
Network restrictions limit access to trusted IP addresses.
Related concept
Authentication checks who the user is.
✗
Set authorization level to anonymous
Why it's wrong here
Anonymous access allows anyone to call the function, which is insecure.
✗
Enable Application Insights
Why it's wrong here
Application Insights provides monitoring and diagnostics, not security controls.
✗
Use function keys only
Why it's wrong here
Function keys provide a shared secret but do not provide fine-grained access control.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-100 question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SC-100 questions on access control and AAA configuration.
Design security solutions for applications and data — This question tests Design security solutions for applications and data — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Enable App Service Authentication (EasyAuth) — Options A and D are correct. Using easy auth (App Service Authentication) and restricting network access reduce attack surface. Option B is wrong because anonymous access is insecure. Option C is wrong because function keys only provide basic auth, not comprehensive security. Option E is wrong because Application Insights is for monitoring, not security.
What should I do if I get this SC-100 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 SC-100 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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