The correct answer is to verify whether the transfer is authorized before isolating. This is because a data exfiltration alert from a SIEM often triggers a high-stakes response, but the most critical step is to confirm the authorization status of the transfer to avoid disrupting legitimate business operations. In the context of the ISC2 Certified in Cybersecurity CC exam, this scenario tests your understanding of the incident response process, specifically the "detection and analysis" phase, where verification must precede containment. A common trap is to jump to isolation or blocking the IP, which can cause unnecessary downtime or tip off a malicious insider. The key memory tip here is "Verify before you isolate"—always confirm the data exfiltration verify authorization step first, as premature action can be more damaging than the threat itself.
ISC2 CC Security Operations Practice Question
This CC practice question tests your understanding of security operations. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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 receives an alert from the SIEM indicating a potential data exfiltration event. The alert shows a large volume of data being transferred to an external IP address during non-business hours. What is the MOST appropriate immediate action?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Verify whether the transfer is authorized.
Option D is correct because verifying the transfer's authorization prevents unnecessary disruption. Option A is too drastic without confirmation. Option B is not efficient and may tip off the user. Option C does not address exfiltration.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Verify whether the transfer is authorized.
Why this is correct
Verification ensures that action is based on confirmed facts.
Related concept
Authentication checks who the user is.
✗
Call the employee who owns the server.
Why it's wrong here
Calling may not be efficient and could alert a potential insider.
✗
Disconnect the affected server from the network.
Why it's wrong here
Disconnecting without verification could impact legitimate operations.
✗
Run an antivirus scan on the server.
Why it's wrong here
Antivirus is not effective for detecting data exfiltration.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CC question in full detail.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CC questions on access control and AAA configuration.
Security Operations — This question tests Security Operations — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Verify whether the transfer is authorized. — Option D is correct because verifying the transfer's authorization prevents unnecessary disruption. Option A is too drastic without confirmation. Option B is not efficient and may tip off the user. Option C does not address exfiltration.
What should I do if I get this CC question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CC questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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