ANS-C01 Network Management and Operations Practice Question
A company has a VPC with multiple subnets and an internet gateway. The security team wants to detect and block malicious traffic patterns. Which AWS service should be used to provide intrusion detection and prevention?
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
✓
AWS Network Firewall
AWS Network Firewall is a managed service that provides both intrusion detection and intrusion prevention capabilities, with stateful inspection of network traffic. Option B (Network ACLs) is incorrect because NACLs are stateless and do not provide intrusion prevention; they only provide basic allow/deny rules. Option C (Security Groups) is incorrect because Security Groups are stateful but only provide instance-level filtering without IPS functionality. Option D (AWS WAF) is incorrect because WAF protects web applications at Layer 7 and does not provide network-level intrusion prevention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS Network Firewall
Why this is correct
Network Firewall provides managed intrusion detection and prevention.
- ✗
Network ACLs
Why it's wrong here
NACLs are stateless and do not provide intrusion prevention.
- ✗
Security Groups
Why it's wrong here
Security Groups are stateful firewalls but do not provide IPS.
- ✗
AWS WAF
Why it's wrong here
WAF is for web application layer, not network layer IPS.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services 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 ANS-C01 exam.