The answer is to first verify the IP address against threat intelligence. This step is critical because command and control traffic incident response first step must always be confirmation—checking a known C2 indicator against a threat feed or reputation database ensures the alert is not a false positive before taking any disruptive action. On the ISC2 Certified in Cybersecurity CC exam, this tests the “Identification” phase of the NIST incident response lifecycle, where analysts validate alerts before containment. A common trap is jumping to isolation or quarantine, but the exam emphasizes that premature action can harm business operations if the traffic is benign. Remember the memory tip: “Verify before you modify”—always confirm the threat with intelligence before isolating, terminating, or quarantining.
ISC2 CC Security Operations Practice Question
This CC practice question tests your understanding of security operations. 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 reviews firewall logs and sees a series of outbound connections from an internal server to a known command-and-control (C2) IP address at regular intervals. Which step should the analyst take first according to incident response best practices?
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.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check if the IP address is associated with known malware or threats.
First, verify the alert is not a false positive by checking threat intelligence. Immediately isolating the server (B) might be too aggressive if it's a false positive. Terminating (C) or quarantining (D) without confirmation can cause unnecessary disruption.
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.
✗
Isolate the server from the network immediately.
Why it's wrong here
Should be done after confirmation to avoid unnecessary disruption.
✓
Check if the IP address is associated with known malware or threats.
Why this is correct
First, validate the alert; then take containment actions.
Clue confirmation
The clue words "best", "first" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Quarantine the server and begin forensic analysis.
Why it's wrong here
Quarantine is a containment step that should follow verification.
✗
Terminate the outbound connections by blocking the IP.
Why it's wrong here
Blocking without verification may impact legitimate traffic and alert the attacker.
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 SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CC question in full detail.
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 CC NAT questions on configuration and troubleshooting.
Security Operations — This question tests Security Operations — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Check if the IP address is associated with known malware or threats. — First, verify the alert is not a false positive by checking threat intelligence. Immediately isolating the server (B) might be too aggressive if it's a false positive. Terminating (C) or quarantining (D) without confirmation can cause unnecessary disruption.
What should I do if I get this CC 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 CC NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best", "first". 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?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This CC 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 CC exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.