The answer is to isolate the host from the network and collect a forensic image of the host’s hard drive. These two immediate actions after confirmed host compromise are critical because isolation stops active outbound connections to malicious destinations, cutting off data exfiltration and lateral movement, while forensic imaging preserves volatile and non-volatile evidence for later analysis without altering the original data. On the Cisco CyberOps Associate 200-201 exam, this scenario tests your understanding of the containment and evidence collection phases in the NIST incident response framework, often appearing as a trap where students mistakenly choose to run antivirus scans or delete logs first. Remember that containment always precedes eradication, and imaging must happen before any system changes. A helpful memory tip is “Isolate and Image, then Investigate”—the two I’s you take before anything else.
200-201 Host-Based Analysis Practice Question
This 200-201 practice question tests your understanding of host-based analysis. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
An analyst is investigating a host that is suspected of being compromised. The host's security logs show multiple failed login attempts followed by a successful login from an unusual IP address, and then a series of outbound connections to known malicious destinations. Which TWO actions should the analyst take immediately? (Choose two.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Isolate the host from the network
Option B is correct because isolating the host from the network immediately stops the outbound connections to known malicious destinations, preventing further data exfiltration, lateral movement, or command-and-control (C2) communication. This containment step is critical in incident response to limit the blast radius before any other investigative or remediation actions are taken.
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.
✗
Delete the malicious files found on the host
Why it's wrong here
Deleting files destroys evidence; preservation is critical.
✓
Isolate the host from the network
Why this is correct
Isolating the host stops ongoing malicious activity and prevents lateral movement.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Collect a forensic image of the host's hard drive
Why this is correct
A forensic image preserves volatile and non-volatile evidence for detailed analysis.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Reboot the host to clear any malware from memory
Why it's wrong here
Rebooting destroys volatile evidence and may allow malware to persist.
✗
Run a full antivirus scan on the host
Why it's wrong here
Running a scan may alter evidence and is not the immediate priority.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that immediate remediation (deleting files, running antivirus) is the priority, when in fact containment (isolation) and evidence preservation (forensic imaging) are the correct first steps in a structured incident response process.
Detailed technical explanation
How to think about this question
In incident response, the SANS PICERL model prioritizes containment (isolation) before eradication or recovery. Isolating a host can be achieved by disabling the network interface, unplugging the Ethernet cable, or using a host-based firewall to block all outbound traffic except to a forensic collection server. This preserves volatile data (e.g., active network connections, running processes) for later memory acquisition while stopping the immediate threat.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation 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.
Host-Based Analysis — This question tests Host-Based Analysis — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Isolate the host from the network — Option B is correct because isolating the host from the network immediately stops the outbound connections to known malicious destinations, preventing further data exfiltration, lateral movement, or command-and-control (C2) communication. This containment step is critical in incident response to limit the blast radius before any other investigative or remediation actions are taken.
What should I do if I get this 200-201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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