MS-900 Practice Question: Describe security, compliance, privacy, and trust in Microsoft 365
This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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.
A user reports receiving a phishing email that bypassed Exchange Online Protection (EOP). What should you configure to add a second layer of defense against sophisticated phishing attacks?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses
Microsoft Defender for Office 365 Plan 2 provides advanced anti-phishing policies, including impersonation protection and automated investigation. Option A (Safe Attachments in EOP) is basic. Option B (DKIM) is email authentication. Option D (blocking all external images) is not a standard anti-phishing measure.
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.
✓
Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses
Why this is correct
Defender for Office 365 Plan 2 includes advanced anti-phishing, impersonation, and automated investigation.
Related concept
Static NAT maps one inside address to one outside address.
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Block all external images in email
Why it's wrong here
This is a privacy feature, not an anti-phishing defense.
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Enable Safe Attachments in Exchange Online Protection
Why it's wrong here
EOP Safe Attachments is basic; Defender for Office 365 provides advanced protection.
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Configure DKIM signing for your domain
Why it's wrong here
DKIM authenticates email, but does not add a second layer of defense.
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-900 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-900 NAT questions on configuration and troubleshooting.
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses — Microsoft Defender for Office 365 Plan 2 provides advanced anti-phishing policies, including impersonation protection and automated investigation. Option A (Safe Attachments in EOP) is basic. Option B (DKIM) is email authentication. Option D (blocking all external images) is not a standard anti-phishing measure.
What should I do if I get this MS-900 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-900 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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