This CS0-003 practice question tests your understanding of security operations. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. A key principle to apply: network flow records provide metadata, not payload content.. 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.
Network flow records show one database server sending large encrypted outbound transfers to an unfamiliar autonomous system during off-hours. Which next step gives the BEST triage value? In the evidence source phase, Which evidence source best supports or refutes the detection?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Correlate flow volume with database audit logs and the destination reputation
Option C is correct because correlating the outbound flow volume with database audit logs allows you to verify whether the encrypted transfers correspond to legitimate database activity (e.g., scheduled backups or replication) or unauthorized data exfiltration. Checking the destination autonomous system's reputation against threat intelligence feeds (e.g., known C2 infrastructure or bulletproof hosting) provides immediate context on whether the traffic is malicious. This dual-correlation approach gives the highest triage value by confirming or refuting the detection without disrupting operations.
Key principle: Network flow records provide metadata, not payload content.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Disable all outbound internet access for the organisation
Why it's wrong here
A broad outage may be disproportionate before the activity is validated.
✗
Delete historical flow records to reduce SIEM cost
Why it's wrong here
Historical telemetry is needed to establish baseline and scope.
✓
Correlate flow volume with database audit logs and the destination reputation
Why this is correct
Flow data identifies suspicious transfer volume; database audit logs and destination context help determine whether sensitive data may have left.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Network flow records provide metadata, not payload content.
✗
Assume encryption means the transfer is safe
Why it's wrong here
Encrypted transport does not prove the destination or activity is legitimate.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that encryption implies safety, but the trap here is that encrypted outbound traffic to an unfamiliar ASN during off-hours is a classic data exfiltration indicator, and the correct triage step is to correlate with internal logs and external reputation before taking action.
Detailed technical explanation
How to think about this question
NetFlow records include source/destination IPs, ports, protocols, and byte counts but not payload content; correlating with database audit logs (e.g., Oracle Unified Audit or SQL Server Audit) reveals which queries or objects were accessed during the transfer window. Destination ASN reputation can be checked via public threat feeds like AlienVault OTX or commercial services (e.g., VirusTotal, GreyNoise) to identify known malicious autonomous systems. In a real-world scenario, this correlation might reveal that the encrypted traffic matches a legitimate encrypted backup to a cloud provider (e.g., AWS S3) or, conversely, that the database audit logs show no corresponding activity, indicating a compromised service account exfiltrating data via a custom TLS tunnel.
KKey Concepts to Remember
Network flow records provide metadata, not payload content.
Database audit logs detail data access and modification events.
Correlation of disparate logs enhances incident triage accuracy.
→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
Network flow records provide metadata, not payload content.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CS0-003 question in full detail.
Review network flow records provide metadata, not payload content., then practise related CS0-003 questions on the same topic to reinforce the concept.
Security Operations — This question tests Security Operations — Network flow records provide metadata, not payload content..
What is the correct answer to this question?
The correct answer is: Correlate flow volume with database audit logs and the destination reputation — Option C is correct because correlating the outbound flow volume with database audit logs allows you to verify whether the encrypted transfers correspond to legitimate database activity (e.g., scheduled backups or replication) or unauthorized data exfiltration. Checking the destination autonomous system's reputation against threat intelligence feeds (e.g., known C2 infrastructure or bulletproof hosting) provides immediate context on whether the traffic is malicious. This dual-correlation approach gives the highest triage value by confirming or refuting the detection without disrupting operations.
What should I do if I get this CS0-003 question wrong?
Review network flow records provide metadata, not payload content., then practise related CS0-003 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Network flow records provide metadata, not payload content.
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