The answer is Microsoft Entra Conditional Access. This solution is the correct choice because it serves as the central policy engine that enforces Zero Trust principles by evaluating every access request against real-time signals such as user identity, device health, geographic location, and risk level before granting or blocking access. On the SC-900 exam, this question tests your understanding of how Microsoft Entra Conditional Access operationalizes the “verify explicitly” and “assume breach” pillars of Zero Trust, often appearing as a scenario where you must distinguish it from other tools like Microsoft Defender for Cloud Apps (which focuses on cloud app discovery and session control) or Microsoft Intune (which handles device management). A common trap is confusing Conditional Access with Microsoft Sentinel, but remember that Sentinel is for security analytics and incident response, not real-time access enforcement. Memory tip: think of Conditional Access as the “bouncer” checking ID, location, and risk before letting anyone through the door.
SC-900 Practice Question: Describe the concepts of security, compliance, and identity
This SC-900 practice question tests your understanding of describe the concepts of security, compliance, and identity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A multinational corporation wants to implement a Zero Trust security model. They plan to verify every access request explicitly, use least privilege access, and assume breach. Which Microsoft security solution should they use to enforce conditional access policies based on user, device, location, and risk?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Entra Conditional Access
Microsoft Entra Conditional Access is the service that enforces access policies based on signals like user, device, location, and risk. Option A is wrong because Microsoft Defender for Cloud Apps provides cloud app security but not the primary conditional access engine. Option C is wrong because Microsoft Intune manages devices but does not enforce access policies on its own. Option D is wrong because Microsoft Sentinel is a SIEM/SOAR solution for security analytics, not access control.
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.
✗
Microsoft Sentinel
Why it's wrong here
Sentinel is for security incident detection and response, not access control.
✗
Microsoft Intune
Why it's wrong here
Intune manages device compliance but does not enforce access policies directly.
✓
Microsoft Entra Conditional Access
Why this is correct
It is the core service for implementing conditional access policies in a Zero Trust model.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
Microsoft Defender for Cloud Apps
Why it's wrong here
While it integrates with Conditional Access, it is not the primary policy enforcement point.
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-900 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-900 questions on access control and AAA configuration.
Describe the concepts of security, compliance, and identity — This question tests Describe the concepts of security, compliance, and identity — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Microsoft Entra Conditional Access — Microsoft Entra Conditional Access is the service that enforces access policies based on signals like user, device, location, and risk. Option A is wrong because Microsoft Defender for Cloud Apps provides cloud app security but not the primary conditional access engine. Option C is wrong because Microsoft Intune manages devices but does not enforce access policies on its own. Option D is wrong because Microsoft Sentinel is a SIEM/SOAR solution for security analytics, not access control.
What should I do if I get this SC-900 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-900 questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
What is the key concept behind this question?
Authentication checks who the user is.
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