- A
Network flow logs (e.g., NetFlow)
Correct: Network flow logs provide data on traffic volume and destinations.
- B
DNS logs
Why wrong: DNS logs can show domain queries but not data volumes.
- C
Proxy logs
Correct: Proxy logs record web requests and can detect large uploads.
- D
System event logs
Why wrong: System logs are more about OS events, not network data transfers.
- E
Application error logs
Why wrong: Error logs are not typically used to detect data exfiltration.
Question 776 of 1,000
SSCP Risk Identification, Monitoring, and Analysis Practice Question
This SSCP practice question tests your understanding of risk identification, monitoring, and analysis. 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 configuring a SIEM to detect potential data exfiltration. Which TWO log sources are most critical for detecting large outbound data transfers?
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
✓
Network flow logs (e.g., NetFlow)
Network flow logs (e.g., NetFlow) are critical because they provide metadata about all network conversations, including source/destination IPs, ports, protocols, and byte counts. By analyzing flow records, a SIEM can detect anomalous spikes in outbound traffic volume or connections to unusual external hosts, which are strong indicators of data exfiltration. NetFlow does not inspect packet payloads, but its aggregated traffic patterns make it ideal for identifying large-scale transfers.
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., NetFlow)
Why this is correct
Correct: Network flow logs provide data on traffic volume and destinations.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
DNS logs
Why it's wrong here
DNS logs can show domain queries but not data volumes.
- ✓
Proxy logs
Why this is correct
Correct: Proxy logs record web requests and can detect large uploads.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
System event logs
Why it's wrong here
System logs are more about OS events, not network data transfers.
- ✗
Application error logs
Why it's wrong here
Error logs are not typically used to detect data exfiltration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that DNS logs are sufficient for detecting exfiltration (e.g., via DNS tunneling), but the question specifically asks for detecting 'large outbound data transfers,' which require volume-based analysis from NetFlow or proxy logs, not just query patterns.
Trap categories for this question
Command / output trap
DNS logs can show domain queries but not data volumes.
Detailed technical explanation
How to think about this question
NetFlow uses a flow cache on routers/switches to aggregate packets with the same 5-tuple (source IP, destination IP, source port, destination port, protocol) and exports flow records via UDP (typically port 2055) using the NetFlow v5 or v9 protocol. A real-world scenario: an attacker uses a compromised internal server to compress and upload a database dump via HTTPS to a cloud storage IP; NetFlow will show a sudden, sustained increase in bytes out to that single external IP, triggering an alert, while proxy logs (option C) would also capture the full URL and HTTP headers if the traffic traverses the proxy, confirming the destination and content type.
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.
TExam Day Tips
- 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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SSCP question test?
Risk Identification, Monitoring, and Analysis — This question tests Risk Identification, Monitoring, and Analysis — 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., NetFlow) — Network flow logs (e.g., NetFlow) are critical because they provide metadata about all network conversations, including source/destination IPs, ports, protocols, and byte counts. By analyzing flow records, a SIEM can detect anomalous spikes in outbound traffic volume or connections to unusual external hosts, which are strong indicators of data exfiltration. NetFlow does not inspect packet payloads, but its aggregated traffic patterns make it ideal for identifying large-scale transfers.
What should I do if I get this SSCP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This SSCP practice question is part of Courseiva's free ISC2 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 SSCP exam.
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