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ISC2 CC Practice Question: Business Continuity, Disaster Recovery, and Incident Response
A financial institution's incident response team is handling a denial-of-service (DoS) attack that is affecting customer access. The team has identified the attack source IPs and implemented filtering rules on the perimeter firewall. Which phase of incident response is being performed?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Containment
Implementing filtering rules to stop the attack is containment, as it prevents the attack from affecting systems further.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Detection
Why it's wrong here
Detection is identifying the incident; here the attack was already detected.
- ✗
Recovery
Why it's wrong here
Recovery restores normal operations after eradication.
- ✗
Eradication
Why it's wrong here
Eradication removes the root cause; filtering is containment.
- ✓
Containment
Why this is correct
Containment involves actions to limit the impact, such as blocking attack sources.
Go deeper
Related to this question
Learn chapter
Access Control Fundamentals
Key term
Incident
An incident is a security event that violates an organization's policies or threatens its data, systems, or operations, requiring a structured response.
Key term
Containment
Containment is the incident response phase where security teams isolate a compromised system or network to prevent the threat from spreading further while preserving evidence.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.