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.
You are a security administrator for a multinational company that uses Microsoft Defender XDR. You have deployed Microsoft Defender for Endpoint on all devices. The company has a strict policy that any device with a high-severity alert must be isolated from the network immediately. You need to configure an automated response that isolates the device as soon as a high-severity alert is generated. What should you do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Enable 'Automatically investigate alerts' in the Microsoft Defender portal.
Why wrong: Wrong: That enables investigation, not isolation.
B
Use the Action Center to manually isolate devices as alerts come in.
Why wrong: Wrong: Manual, not automated.
C
Create a device group for high-severity alerts and configure a conditional access policy to block network access.
Why wrong: Wrong: Conditional access does not isolate devices.
D
In Microsoft Defender XDR, navigate to Settings > Endpoints > Automated investigation and response, and configure the automation level for high-severity alerts to 'Full - remediate threats automatically'.
Correct: Automation level includes automatic isolation.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In Microsoft Defender XDR, navigate to Settings > Endpoints > Automated investigation and response, and configure the automation level for high-severity alerts to 'Full - remediate threats automatically'.
Option B is correct because automation levels in incident response rules allow automatic isolation for high-severity alerts. Option A is wrong because device groups are not directly linked to automatic isolation. Option C is wrong because action center is for manual actions. Option D is wrong because that setting controls automatic investigation, not isolation.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 'Automatically investigate alerts' in the Microsoft Defender portal.
Why it's wrong here
Wrong: That enables investigation, not isolation.
✗
Use the Action Center to manually isolate devices as alerts come in.
Why it's wrong here
Wrong: Manual, not automated.
✗
Create a device group for high-severity alerts and configure a conditional access policy to block network access.
Why it's wrong here
Wrong: Conditional access does not isolate devices.
✓
In Microsoft Defender XDR, navigate to Settings > Endpoints > Automated investigation and response, and configure the automation level for high-severity alerts to 'Full - remediate threats automatically'.
Why this is correct
Correct: Automation level includes automatic isolation.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 MS-102 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MS-102 NAT questions on configuration and troubleshooting.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: In Microsoft Defender XDR, navigate to Settings > Endpoints > Automated investigation and response, and configure the automation level for high-severity alerts to 'Full - remediate threats automatically'. — Option B is correct because automation levels in incident response rules allow automatic isolation for high-severity alerts. Option A is wrong because device groups are not directly linked to automatic isolation. Option C is wrong because action center is for manual actions. Option D is wrong because that setting controls automatic investigation, not isolation.
What should I do if I get this MS-102 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MS-102 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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