CV0-004 Security Practice Question
An organization uses AWS and wants to control inbound traffic to its EC2 instances. They need a solution that automatically allows response traffic for any permitted inbound request. Which of the following should they use?
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
✓
Security groups
Security groups are stateful, meaning if you allow inbound traffic, the response is automatically allowed regardless of outbound rules. Network ACLs are stateless and require explicit rules for both directions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DDoS protection
Why it's wrong here
DDoS protection is for mitigating distributed denial-of-service attacks, not for stateful traffic management.
- ✗
Web Application Firewall
Why it's wrong here
WAF is for HTTP/HTTPS traffic filtering, not for managing stateful response traffic.
- ✓
Security groups
Why this is correct
Security groups are stateful and automatically allow return traffic.
- ✗
Network ACLs
Why it's wrong here
NACLs are stateless and require explicit outbound rules for response traffic.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.