The correct combination is Azure Monitor and Microsoft Sentinel. Azure Monitor handles the foundational logging requirement by collecting and storing all access to cardholder data, while Microsoft Sentinel builds on that data to provide real-time alerting for unauthorized access attempts, fulfilling PCI DSS logging and monitoring mandates. On the Microsoft Cybersecurity Architect exam, this question tests your understanding of how Azure services layer responsibilities—Azure Monitor for raw telemetry and Sentinel for security information and event management (SIEM). A common trap is confusing Defender for Cloud’s posture management with actual logging, or assuming Azure Policy can generate alerts. Remember the memory tip: “Monitor logs it, Sentinel alerts it.”
SC-100 Practice Question: Design security solutions for applications and data
This SC-100 practice question tests your understanding of design security solutions for applications and data. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company uses Microsoft Azure to host a critical application that processes credit card payments. The application must comply with PCI DSS. You need to ensure that all access to cardholder data is logged and monitored, and that any unauthorized access attempts trigger an alert. Which combination of services should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Monitor and Microsoft Sentinel
Option B is correct: Azure Monitor logs access, and Microsoft Sentinel provides alerting. Option A is wrong: Defender for Cloud provides security posture but not logging. Option C is wrong: Azure Policy enforces compliance but does not log or alert. Option D is wrong: Key Vault is for secrets, not logging.
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.
✗
Azure Policy and Microsoft Defender for Cloud Apps
Why it's wrong here
Defender for Cloud Apps is for SaaS apps, not Azure resources.
✗
Azure Policy and Microsoft Defender for Cloud
Why it's wrong here
Azure Policy enforces rules but does not log access; Defender for Cloud provides recommendations.
✗
Azure Key Vault and Microsoft Defender for Cloud
Why it's wrong here
Key Vault is for secrets; Defender for Cloud does not provide logging.
✓
Azure Monitor and Microsoft Sentinel
Why this is correct
Azure Monitor collects logs, and Sentinel provides alerting on suspicious activity.
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 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 applications and data — This question tests Design security solutions for applications and data — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Azure Monitor and Microsoft Sentinel — Option B is correct: Azure Monitor logs access, and Microsoft Sentinel provides alerting. Option A is wrong: Defender for Cloud provides security posture but not logging. Option C is wrong: Azure Policy enforces compliance but does not log or alert. Option D is wrong: Key Vault is for secrets, not logging.
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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