The answer is the "Assume breach" principle. This is correct because the architect is designing for inevitable breaches by refusing to trust any network segment, including the corporate internal network, and applying security controls to all traffic while continuously monitoring for threats as if a compromise has already occurred. On the SC-900 exam, this principle tests your understanding that Zero Trust shifts from a perimeter-based defense to a "never trust, always verify" mindset, where every request is treated as potentially hostile regardless of origin. A common trap is confusing this with "verify explicitly," but remember: assume breach focuses on the *mindset* that a breach has already happened, driving continuous detection and segmentation, while verify explicit is about authenticating every access request. Memory tip: think "Assume breach = breach is already inside, so monitor everything."
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 security architect is implementing a Zero Trust security model. The architect insists that the network perimeter should not be trusted and that security controls must be applied to all traffic, even within the corporate network. They also emphasize the need for continuous monitoring and detection of threats as if a breach has already occurred. Which Zero Trust principle is the architect primarily applying?
Why wrong: Verify explicitly focuses on authenticating and authorizing every access request based on identity, device, and other signals, not primarily on assuming a breach.
B
Least privilege access
Why wrong: Least privilege limits user access to the minimum needed, but does not directly imply continuous monitoring and assumption of breach.
C
Assume breach
Assume breach is the Zero Trust principle that expects a breach may have already occurred, driving continuous monitoring, segmentation, and threat detection.
D
Trust but verify
Why wrong: 'Trust but verify' is an older security model, not a core principle of Zero Trust, which is built on 'never trust, always verify' and assume breach.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Assume breach
The architect's emphasis on not trusting the network perimeter and applying security controls to all traffic, combined with continuous monitoring as if a breach has already occurred, directly aligns with the 'Assume breach' principle of Zero Trust. This principle operates on the mindset that a breach is inevitable or has already happened, thus requiring constant verification and monitoring of all network traffic, even within the corporate network, rather than relying on a trusted internal zone.
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 it's wrong here
Verify explicitly focuses on authenticating and authorizing every access request based on identity, device, and other signals, not primarily on assuming a breach.
✗
Least privilege access
Why it's wrong here
Least privilege limits user access to the minimum needed, but does not directly imply continuous monitoring and assumption of breach.
✓
Assume breach
Why this is correct
Assume breach is the Zero Trust principle that expects a breach may have already occurred, driving continuous monitoring, segmentation, and threat detection.
Related concept
Read the scenario before looking for a memorised answer.
✗
Trust but verify
Why it's wrong here
'Trust but verify' is an older security model, not a core principle of Zero Trust, which is built on 'never trust, always verify' and assume breach.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the distinction between 'Assume breach' and 'Verify explicitly' by describing a scenario that includes both continuous monitoring and strict access controls, leading candidates to confuse the proactive verification requirement with the reactive breach-assumption mindset.
Detailed technical explanation
How to think about this question
Under the hood, 'Assume breach' drives the implementation of micro-segmentation and real-time analytics, such as using Azure Sentinel or Microsoft Defender for Cloud to continuously analyze traffic patterns and user behavior for signs of lateral movement. In practice, this principle mandates that security teams deploy tools like network traffic logs (e.g., NetFlow), endpoint detection and response (EDR) agents, and identity-based conditional access policies to treat every packet and authentication request as potentially malicious, even if it originates from a trusted subnet or domain-joined device.
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: Assume breach — The architect's emphasis on not trusting the network perimeter and applying security controls to all traffic, combined with continuous monitoring as if a breach has already occurred, directly aligns with the 'Assume breach' principle of Zero Trust. This principle operates on the mindset that a breach is inevitable or has already happened, thus requiring constant verification and monitoring of all network traffic, even within the corporate network, rather than relying on a trusted internal zone.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SC-900 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 SC-900 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.