- A
Block the device in Microsoft Intune
Why wrong: Incorrect: Blocking in Intune prevents access to resources but does not isolate the device from the network, so ransomware can still spread.
- B
Initiate device isolation from the Microsoft Defender for Endpoint console
Correct: Initiating device isolation from Microsoft Defender for Endpoint disconnects the device from all network traffic except Defender communication, containing the threat.
- C
Disable the Windows Firewall via Intune
Why wrong: Incorrect: Disabling Windows Firewall removes network protections and does not isolate the device; it actually increases vulnerability.
- D
Run a full antivirus scan from Microsoft Defender for Endpoint
Why wrong: Incorrect: Running a full antivirus scan can detect malware but does not stop network propagation; isolation is needed first.
SC-200 Device isolation Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: device isolation. 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.
During a ransomware incident, a security analyst needs to isolate an affected Windows 10 device managed by Microsoft Intune. The device is currently online and connected to the corporate network. Which remediation action should be taken from Microsoft Defender XDR to achieve this?
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
Initiate device isolation from the Microsoft Defender for Endpoint console
Option B is correct because device isolation in Microsoft Defender for Endpoint disconnects the device from the network while allowing communication with the Defender service, effectively containing the ransomware. Option A is incorrect because blocking the device in Intune revokes access to corporate resources but does not isolate the device from the network entirely. Option C is incorrect because disabling the Windows Firewall would increase exposure and not achieve isolation. Option D is incorrect because running a full antivirus scan does not isolate the device and may not stop the ransomware from spreading.
Key principle: Device isolation
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Block the device in Microsoft Intune
Why it's wrong here
Incorrect: Blocking in Intune prevents access to resources but does not isolate the device from the network, so ransomware can still spread.
- ✓
Initiate device isolation from the Microsoft Defender for Endpoint console
Why this is correct
Correct: Initiating device isolation from Microsoft Defender for Endpoint disconnects the device from all network traffic except Defender communication, containing the threat.
Related concept
Device isolation
- ✗
Disable the Windows Firewall via Intune
Why it's wrong here
Incorrect: Disabling Windows Firewall removes network protections and does not isolate the device; it actually increases vulnerability.
- ✗
Run a full antivirus scan from Microsoft Defender for Endpoint
Why it's wrong here
Incorrect: Running a full antivirus scan can detect malware but does not stop network propagation; isolation is needed first.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Device isolation
- Microsoft Defender for Endpoint
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
Device isolation
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 device isolation, then practise related SC-200 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SC-200 question test?
Respond to security incidents — This question tests Respond to security incidents — Device isolation.
What is the correct answer to this question?
The correct answer is: Initiate device isolation from the Microsoft Defender for Endpoint console — Option B is correct because device isolation in Microsoft Defender for Endpoint disconnects the device from the network while allowing communication with the Defender service, effectively containing the ransomware. Option A is incorrect because blocking the device in Intune revokes access to corporate resources but does not isolate the device from the network entirely. Option C is incorrect because disabling the Windows Firewall would increase exposure and not achieve isolation. Option D is incorrect because running a full antivirus scan does not isolate the device and may not stop the ransomware from spreading.
What should I do if I get this SC-200 question wrong?
Review device isolation, then practise related SC-200 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Device isolation
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Last reviewed: Jun 21, 2026
This SC-200 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-200 exam.
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