ANS-C01 Network Security, Compliance and Governance Practice Question
A company is implementing a network security solution for a VPC that contains a web application. The application uses an Application Load Balancer (ALB) to distribute traffic to EC2 instances in private subnets. The company wants to protect against common web exploits and also filter outbound traffic from the instances. Which TWO services should be used together?
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 WAF
To protect against common web exploits, AWS WAF (Option B) should be used with the ALB to filter incoming HTTP/HTTPS requests. For filtering outbound traffic from the EC2 instances, AWS Network Firewall (Option C) provides stateful inspection of both inbound and outbound traffic. Option A (AWS Shield Advanced) is a DDoS protection service, not for web exploit filtering. Option D (Network ACLs) are stateless and cannot perform content-based filtering. Option E (Amazon GuardDuty) is a threat detection service, not a firewall.
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 Shield Advanced
Why it's wrong here
Shield Advanced provides DDoS protection, not web exploit filtering.
- ✓
AWS WAF
Why this is correct
WAF can be associated with the ALB to filter web requests.
- ✓
AWS Network Firewall
Why this is correct
Network Firewall can inspect and filter outbound traffic from instances.
- ✗
Network ACLs
Why it's wrong here
NACLs are stateless and cannot inspect application layer traffic.
- ✗
Amazon GuardDuty
Why it's wrong here
GuardDuty is a threat detection service, not a firewall.
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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.