Quick Answer
The primary purpose of isolating a compromised workstation is to prevent further damage. By cutting off network connectivity—such as disabling the switch port or unplugging the cable—the incident response team halts all inbound and outbound traffic, which stops an attacker from moving laterally to other systems, exfiltrating data, or deploying additional malware. This containment action is a critical step in the ISC2 Certified in Cybersecurity CC exam, where it tests your understanding of the containment phase within the incident response process. A common trap is confusing containment with eradication or recovery; remember that containment’s goal is to limit scope and impact, not to remove the threat or restore systems. For a quick memory tip, think “Isolate to terminate the trail”—cutting the network cord stops the attack from spreading.
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.
During a security incident, the incident response team isolates a compromised workstation from the network. What is the primary purpose of this action?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
To prevent further damage.
Containment stops the attack from spreading.
To comply with legal requirements.
Why wrong: Compliance may require isolation but it is not the primary purpose.
To preserve forensic evidence.
Why wrong: Isolation helps but evidence preservation is a separate process.
To allow normal operations to continue.
Why wrong: Isolation disrupts operations, it does not allow them to continue normally.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
To prevent further damage.
Isolating a compromised workstation by disconnecting it from the network (e.g., disabling its switch port or unplugging the Ethernet cable) immediately stops all inbound and outbound traffic. This containment action prevents the attacker from moving laterally to other systems, exfiltrating data, or deploying additional malware, thereby limiting the scope and impact of the incident.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
To prevent further damage.
Why this is correct
Containment stops the attack from spreading.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
To comply with legal requirements.
Why it's wrong here
Compliance may require isolation but it is not the primary purpose.
To preserve forensic evidence.
Why it's wrong here
Isolation helps but evidence preservation is a separate process.
To allow normal operations to continue.
Why it's wrong here
Isolation disrupts operations, it does not allow them to continue normally.
Common exam traps
ISC2 often tests the distinction between containment (stopping the spread) and eradication (removing the threat); the trap here is that candidates confuse the secondary benefit of preserving evidence (Option C) with the primary purpose of isolation, which is to prevent further damage.
Detailed technical explanation
Under the hood, isolation can be implemented at Layer 2 by administratively shutting down the switch port (interface shutdown) or at Layer 3 by removing the IP address or applying an ACL that drops all traffic. In a real-world scenario, if a host is infected with ransomware that is actively encrypting network shares, immediate isolation via switch port shutdown stops the encryption process mid-stream, preventing further file damage and giving the response team time to assess the scope without the attacker interfering.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Security Operations — This question tests Security Operations — Read the scenario before looking for a memorised answer..
The correct answer is: To prevent further damage. — Isolating a compromised workstation by disconnecting it from the network (e.g., disabling its switch port or unplugging the Ethernet cable) immediately stops all inbound and outbound traffic. This containment action prevents the attacker from moving laterally to other systems, exfiltrating data, or deploying additional malware, thereby limiting the scope and impact of the incident.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
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.
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