The answer is that the column RemoteIPType does not exist in the DeviceNetworkEvents table. This is the most likely reason your KQL query returns no results, because when you filter on a non-existent column, Kusto silently excludes all rows rather than throwing an error, effectively making the query return an empty set. On the Microsoft Security Operations Analyst SC-200 exam, this tests your understanding of KQL schema awareness and the common trap of assuming column names from documentation or memory without verifying actual table schemas. A frequent mistake is confusing RemoteIPType with the correct column, RemoteIP, or overlooking that DeviceNetworkEvents uses different column names than other tables like CommonSecurityLog. To avoid this, always use the `getschema` operator or explore the table in Log Analytics before writing filters. Memory tip: if your query returns zero results but the syntax is valid, suspect a phantom column—verify the schema first.
SC-200 Perform threat hunting Practice Question
This SC-200 practice question tests your understanding of perform threat hunting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Refer to the exhibit.
```kusto
let TimeRange = 7d;
let SuspiciousIPs = materialize(
DeviceNetworkEvents
| where Timestamp > ago(TimeRange)
| where RemoteIPType == "Public"
| where RemotePort == 445
| summarize Count = count() by RemoteIP
| where Count > 100
);
DeviceNetworkEvents
| where Timestamp > ago(TimeRange)
| where RemoteIP in (SuspiciousIPs)
| summarize ConnectionCount = count() by DeviceName, RemoteIP
```
You are analyzing the KQL query above in Microsoft Sentinel. The query is designed to find devices with high outbound SMB (port 445) connections to suspicious public IPs. However, the query returns no results. What is the most likely issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Refer to the exhibit.
```kusto
let TimeRange = 7d;
let SuspiciousIPs = materialize(
DeviceNetworkEvents
| where Timestamp > ago(TimeRange)
| where RemoteIPType == "Public"
| where RemotePort == 445
| summarize Count = count() by RemoteIP
| where Count > 100
);
DeviceNetworkEvents
| where Timestamp > ago(TimeRange)
| where RemoteIP in (SuspiciousIPs)
| summarize ConnectionCount = count() by DeviceName, RemoteIP
```
A
Port 445 is not used for SMB.
Why wrong: Port 445 is indeed used for SMB over TCP.
B
The column RemoteIPType does not exist in DeviceNetworkEvents.
DeviceNetworkEvents uses 'RemoteIPType'? Actually it is 'RemoteIPType' may not exist; typical columns are 'RemoteIP', 'RemotePort', etc. This likely causes the where clause to fail.
C
The materialize function is not allowed in this context.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The column RemoteIPType does not exist in DeviceNetworkEvents.
Option A is correct because RemoteIPType is not a standard column in DeviceNetworkEvents; the actual column is RemoteIPType, but it might be spelled differently or not exist, causing the filter to exclude all rows. Option B is incorrect because materialize is used correctly. Option C is incorrect because the syntax is valid. Option D is incorrect because port 445 is standard SMB.
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.
The column RemoteIPType does not exist in DeviceNetworkEvents.
Why this is correct
DeviceNetworkEvents uses 'RemoteIPType'? Actually it is 'RemoteIPType' may not exist; typical columns are 'RemoteIP', 'RemotePort', etc. This likely causes the where clause to fail.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The materialize function is not allowed in this context.
Why it's wrong here
materialize is valid in KQL.
✗
The syntax for the second query is incorrect.
Why it's wrong here
The syntax appears correct.
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 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.
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: The column RemoteIPType does not exist in DeviceNetworkEvents. — Option A is correct because RemoteIPType is not a standard column in DeviceNetworkEvents; the actual column is RemoteIPType, but it might be spelled differently or not exist, causing the filter to exclude all rows. Option B is incorrect because materialize is used correctly. Option C is incorrect because the syntax is valid. Option D is incorrect because port 445 is standard SMB.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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