- A
DeviceNetworkEvents | where TimeGenerated > ago(24h) | where LocalIP == "10.0.0.5" | where RemoteIP !startswith "10."
Why wrong: DeviceNetworkEvents is from Defender for Endpoint, not Sentinel's common schema; also the private IP check is incomplete.
- B
CommonSecurityLog | where TimeGenerated > ago(24h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Correctly filters source IP and external destinations over 24h.
- C
CommonSecurityLog | where TimeGenerated > ago(24h) | where DestinationIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Why wrong: Filters on DestinationIP instead of SourceIP.
- D
CommonSecurityLog | where TimeGenerated > ago(1h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Why wrong: Time filter is only 1 hour, not 24 hours.
Quick Answer
The correct KQL query is CommonSecurityLog | where TimeGenerated > ago(24h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false because it precisely filters for outbound network connections from the specific IP 10.0.0.5 over the last 24 hours while excluding any traffic destined for private IP ranges, ensuring only external destinations are captured. This query leverages the ipv4_is_private function to isolate true internet-bound connections, a critical technique when query outbound network connections from specific IP addresses during threat hunting. On the SC-200 exam, this tests your ability to distinguish between source and destination filters and to apply time range constraints correctly—a common trap is confusing SourceIP with DestinationIP or using the wrong time window like ago(1h). For a quick memory tip, remember "Source to not-private" to recall that you filter on the source IP and then negate private destinations.
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.
A security analyst is performing threat hunting in Microsoft Sentinel using KQL. The analyst wants to identify all network connections initiated from a specific internal IP address (10.0.0.5) to external IP addresses in the last 24 hours. Which KQL query should the analyst use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
CommonSecurityLog | where TimeGenerated > ago(24h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Option C is correct because it filters on the source IP and only includes connections to external IPs using a where clause for not having a private IP range. Option A is wrong because it checks destination IP instead of source. Option B is wrong because it only checks last hour. Option D is wrong because it uses the wrong table.
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.
- ✗
DeviceNetworkEvents | where TimeGenerated > ago(24h) | where LocalIP == "10.0.0.5" | where RemoteIP !startswith "10."
Why it's wrong here
DeviceNetworkEvents is from Defender for Endpoint, not Sentinel's common schema; also the private IP check is incomplete.
- ✓
CommonSecurityLog | where TimeGenerated > ago(24h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Why this is correct
Correctly filters source IP and external destinations over 24h.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
CommonSecurityLog | where TimeGenerated > ago(24h) | where DestinationIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Why it's wrong here
Filters on DestinationIP instead of SourceIP.
- ✗
CommonSecurityLog | where TimeGenerated > ago(1h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false
Why it's wrong here
Time filter is only 1 hour, not 24 hours.
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.
What to study next
Got this wrong? Here's your next step.
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.
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Perform threat hunting — study guide chapter
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FAQ
Questions learners often ask
What does this SC-200 question test?
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: CommonSecurityLog | where TimeGenerated > ago(24h) | where SourceIP == "10.0.0.5" | where ipv4_is_private(DestinationIP) == false — Option C is correct because it filters on the source IP and only includes connections to external IPs using a where clause for not having a private IP range. Option A is wrong because it checks destination IP instead of source. Option B is wrong because it only checks last hour. Option D is wrong because it uses the wrong table.
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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Last reviewed: Jun 21, 2026
This SC-200 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-200 exam.
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