The answer is the Verify explicitly principle. This is correct because, under a Zero Trust security model, Verify explicitly mandates that every single access request must be fully authenticated, authorized, and verified based on all available signals—such as user identity, device health, location, and behavioral data—regardless of whether the request comes from inside or outside the corporate network. On the Microsoft SC-900 exam, this principle tests your understanding that Zero Trust eliminates implicit trust, even for traffic on the internal network. A common trap is confusing this with the "Assume breach" principle, which focuses on minimizing blast radius rather than pre-access verification. To remember it, think: "Trust no one, verify everything—every request, every time."
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.
An organization is implementing a Zero Trust security model. Which principle requires that every access request must be fully authenticated, authorized, and verified based on all available signals, regardless of the user's network location?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Verify explicitly
The 'Verify explicitly' principle of Zero Trust mandates that every access request must be fully authenticated, authorized, and encrypted based on all available data points—including user identity, device health, location, and behavioral signals—regardless of whether the request originates from inside or outside the corporate network. This contrasts with traditional perimeter-based models that implicitly trust internal traffic.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Verify explicitly
Why this is correct
This principle states that authentication and authorization should be performed for every access request using all available signals.
Related concept
Read the scenario before looking for a memorised answer.
✗
Least privilege
Why it's wrong here
Least privilege is about granting only the minimum permissions required, not about the verification process itself.
✗
Assume breach
Why it's wrong here
Assume breach focuses on minimizing blast radius and segmenting access, not on the initial verification of access requests.
✗
Defense in depth
Why it's wrong here
Defense in depth is a layered security approach, not one of the three foundational Zero Trust principles.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'Verify explicitly' with 'Least privilege' because both involve access control, but 'Verify explicitly' is about continuous authentication and authorization of every request, while 'Least privilege' is about limiting permissions after access is granted.
Detailed technical explanation
How to think about this question
Under the hood, 'Verify explicitly' relies on continuous conditional access policies in Microsoft Entra ID, which evaluate real-time signals such as user risk (from Identity Protection), device compliance (via Intune MDM), and location (IP address) before issuing a token. For example, even a user with valid credentials from a corporate IP might be denied access if their device lacks the latest security patch, forcing re-authentication or blocking the request outright.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Describe the concepts of security, compliance, and identity — This question tests Describe the concepts of security, compliance, and identity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Verify explicitly — The 'Verify explicitly' principle of Zero Trust mandates that every access request must be fully authenticated, authorized, and encrypted based on all available data points—including user identity, device health, location, and behavioral signals—regardless of whether the request originates from inside or outside the corporate network. This contrasts with traditional perimeter-based models that implicitly trust internal traffic.
What should I do if I get this SC-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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