The answer is analyzing beaconing patterns, detecting DNS tunneling, and examining SSL/TLS certificate anomalies. These three techniques are foundational for identifying command and control (C2) communication because C2 channels rely on stealthy, persistent connections that evade traditional perimeter defenses. Beaconing patterns reveal periodic, low-bandwidth check-ins with external servers, DNS tunneling exploits DNS queries to exfiltrate data or issue commands, and anomalous SSL/TLS certificates—such as self-signed or mismatched certificates—often indicate malicious infrastructure. On the Microsoft Security Operations Analyst SC-200 exam, this question tests your ability to distinguish C2 detection methods from unrelated security controls; a common trap is confusing brute force detection (a credential attack) or email header analysis (phishing) with C2 hunting. Remember that C2 is about outbound communication patterns, not inbound attacks. A useful memory tip is the acronym BDT: Beaconing, DNS tunneling, and TLS anomalies—the three pillars of C2 detection in Microsoft Sentinel.
SC-200 Perform threat hunting Practice Question
This SC-200 practice question tests your understanding of perform threat hunting. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 techniques are commonly used in Microsoft Sentinel threat hunting to identify command and control (C2) communication? (Select THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Detecting DNS tunneling
Options A, B, and E are correct because analyzing beaconing patterns, detecting DNS tunneling, and examining SSL/TLS certificates are common C2 detection methods. Option C is wrong because brute force detection is for credential attacks, not C2. Option D is wrong because analyzing email headers is for phishing, not C2.
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.
✗
Analyzing email headers for phishing
Why it's wrong here
Email header analysis is for phishing detection, not C2.
Static NAT maps one inside address to one outside address.
✓
Analyzing network beaconing patterns
Why this is correct
Beaconing patterns (periodic connections) are indicative of C2.
Related concept
Static NAT maps one inside address to one outside address.
✓
Examining SSL/TLS certificate anomalies
Why this is correct
Anomalous certificates can indicate C2 infrastructure.
Related concept
Static NAT maps one inside address to one outside address.
✗
Identifying brute force attempts
Why it's wrong here
Brute force is for credential compromise, not C2.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-200 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-200 NAT questions on configuration and troubleshooting.
Perform threat hunting — This question tests Perform threat hunting — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Detecting DNS tunneling — Options A, B, and E are correct because analyzing beaconing patterns, detecting DNS tunneling, and examining SSL/TLS certificates are common C2 detection methods. Option C is wrong because brute force detection is for credential attacks, not C2. Option D is wrong because analyzing email headers is for phishing, not C2.
What should I do if I get this SC-200 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-200 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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