The answer is Windows Event Logs (System and DNS Server events), DNS events, and network flow logs. These three data sources for DNS tunneling detection in Microsoft Sentinel work together because DNS tunneling exfiltrates data by encoding it within DNS queries and responses, so you need DNS server logs or Azure DNS logs to spot anomalous query patterns, network flow logs to identify unusually high volumes of DNS traffic, and Windows Event Logs as a fallback when direct DNS server logs are unavailable. On the SC-200 exam, this question tests your ability to distinguish between telemetry sources that capture network-layer anomalies versus those focused on user or secret access, with common traps being Azure Key Vault logs or Microsoft 365 audit logs, which track different threat vectors. A helpful memory tip is to remember the three D’s: DNS logs, Data volume logs (network flows), and Device logs (Windows Event Logs).
SC-200 Perform threat hunting Practice Question
This SC-200 practice question tests your understanding of perform threat hunting. 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.
Which THREE data sources should be included in a threat hunt to detect data exfiltration via DNS tunneling in Microsoft Sentinel?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Network flow logs (e.g., Azure Network Watcher)
DNS events (from DNS servers or Azure DNS), network flow logs (to see volume), and Windows Event Logs (if DNS server logs are not directly available) can help detect DNS tunneling. Option C (Azure Key Vault logs) are for secret access. Option E (Microsoft 365 audit logs) are for user activities.
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.
✓
Network flow logs (e.g., Azure Network Watcher)
Why this is correct
Flow logs help correlate DNS query volumes with network traffic.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Key Vault diagnostic logs
Why it's wrong here
Key Vault logs track access to secrets, not DNS traffic.
✓
DNS server logs (e.g., from Windows DNS Server or Azure DNS)
Why this is correct
DNS logs show query patterns indicative of tunneling.
Related concept
Read the scenario before looking for a memorised answer.
✓
Windows Event Logs (System and DNS Server events)
Why this is correct
Event logs from DNS servers provide detailed query information.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft 365 audit logs
Why it's wrong here
Audit logs cover user actions in M365, not DNS traffic.
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.
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 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-200 question in full detail.
Identify which SC-200 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.
Perform threat hunting — This question tests Perform threat hunting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Network flow logs (e.g., Azure Network Watcher) — DNS events (from DNS servers or Azure DNS), network flow logs (to see volume), and Windows Event Logs (if DNS server logs are not directly available) can help detect DNS tunneling. Option C (Azure Key Vault logs) are for secret access. Option E (Microsoft 365 audit logs) are for user activities.
What should I do if I get this SC-200 question wrong?
Identify which SC-200 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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