SC-100 Design security solutions for infrastructure Practice Question
This SC-100 practice question tests your understanding of design security solutions for infrastructure. 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 Identity (MDI) to protect on-premises Active Directory. You need to integrate MDI with Microsoft Sentinel to centralize detection and response. What is the required configuration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the Microsoft Defender for Identity data connector in Microsoft Sentinel.
Option A is correct because the MDI data connector in Sentinel enables ingestion of MDI alerts. Option B is wrong because MDI does not use Syslog for its native alerts; it uses a specific connector. Option C is wrong because Azure AD Identity Protection is for cloud identities, not on-premises AD. Option D is wrong because the MDI sensor is already deployed on-premises; no need to deploy it in Azure.
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.
✗
Deploy the MDI sensor on an Azure VM to send data to Sentinel.
Why it's wrong here
MDI sensor is already on-premises; the connector in Sentinel is sufficient.
✗
Integrate Microsoft Entra ID Protection with Sentinel instead.
Why it's wrong here
Entra ID Protection is for cloud identities, not on-premises AD.
✓
Enable the Microsoft Defender for Identity data connector in Microsoft Sentinel.
Why this is correct
This connector ingests MDI alerts into Sentinel.
Related concept
Static NAT maps one inside address to one outside address.
✗
Configure MDI to forward logs to a Syslog server, then use the Syslog connector in Sentinel.
Why it's wrong here
MDI has a dedicated connector; Syslog is not required.
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 SC-100 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 SC-100 NAT questions on configuration and troubleshooting.
Design security solutions for infrastructure — This question tests Design security solutions for infrastructure — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Enable the Microsoft Defender for Identity data connector in Microsoft Sentinel. — Option A is correct because the MDI data connector in Sentinel enables ingestion of MDI alerts. Option B is wrong because MDI does not use Syslog for its native alerts; it uses a specific connector. Option C is wrong because Azure AD Identity Protection is for cloud identities, not on-premises AD. Option D is wrong because the MDI sensor is already deployed on-premises; no need to deploy it in Azure.
What should I do if I get this SC-100 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 SC-100 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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