ANS-C01 Network Implementation Practice Question
A company has a VPC with an Application Load Balancer (ALB) that distributes traffic to EC2 instances in private subnets. The ALB needs to be accessible from the internet. The security team requires that all traffic to the ALB be inspected by AWS WAF. Which configuration meets these requirements?
⚠ Common exam trap
Test-takers frequently think CloudFront is always required for WAF integration, but AWS WAF can be directly associated with an internet-facing ALB without needing CloudFront.
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
✓
Associate AWS WAF with the ALB and make the ALB internet-facing
AWS WAF can be directly associated with an Application Load Balancer (ALB) to inspect HTTP/HTTPS traffic before it reaches the ALB. Making the ALB internet-facing allows it to receive traffic directly from the internet while WAF provides the required traffic inspection. This combination meets both the accessibility and security requirements without additional components.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Associate AWS WAF with the ALB and make the ALB internet-facing
Why this is correct
ALB supports AWS WAF integration for web traffic inspection.
- ✗
Use a Network Load Balancer with AWS WAF attached
Why it's wrong here
NLB does not support AWS WAF; WAF works with ALB and CloudFront.
- ✗
Place the ALB behind a Security Group that inspects traffic
Why it's wrong here
Security Groups are for allow/deny rules, not WAF inspection.
- ✗
Use Amazon CloudFront in front of the ALB with AWS WAF
Why it's wrong here
While valid, it adds unnecessary complexity; WAF directly on ALB is sufficient.
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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.