MS-102 Practice Question: Manage security and threats by using Microsoft Defender XDR
This MS-102 practice question tests your understanding of manage security and threats by using microsoft defender xdr. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your organization uses Microsoft Defender for Endpoint. You need to ensure that when a user clicks a malicious link in an email, the endpoint is automatically isolated. What should you configure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure an automated investigation and response (AIR) playbook for device isolation.
Option C is correct because automated investigation and response (AIR) can be configured to isolate a device when a malicious link is clicked. Option A is wrong because attack surface reduction rules reduce vulnerability but do not automatically isolate. Option B is wrong because network protection blocks connections but does not isolate. Option D is wrong because custom detection rules can trigger isolation but require additional configuration; AIR is the built-in automation.
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.
✗
Enable network protection in block mode.
Why it's wrong here
Network protection blocks connections to malicious URLs but does not isolate the device.
✓
Configure an automated investigation and response (AIR) playbook for device isolation.
Why this is correct
AIR can automatically isolate a device when an alert like 'malicious link clicked' is triggered.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure attack surface reduction rules to block the link.
Why it's wrong here
ASR rules block actions but do not isolate the device automatically.
✗
Create a custom detection rule to trigger isolation.
Why it's wrong here
Custom detection rules can be created but require more effort; AIR provides built-in automation for common scenarios.
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.
Trap categories for this question
Scenario analysis trap
Custom detection rules can be created but require more effort; AIR provides built-in automation for common scenarios.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 question in full detail.
Identify which MS-102 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure an automated investigation and response (AIR) playbook for device isolation. — Option C is correct because automated investigation and response (AIR) can be configured to isolate a device when a malicious link is clicked. Option A is wrong because attack surface reduction rules reduce vulnerability but do not automatically isolate. Option B is wrong because network protection blocks connections but does not isolate. Option D is wrong because custom detection rules can trigger isolation but require additional configuration; AIR is the built-in automation.
What should I do if I get this MS-102 question wrong?
Identify which MS-102 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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