ANS-C01 Network Implementation Practice Question
A company wants to restrict outbound traffic from a VPC to only allow HTTPS traffic to a specific list of domains. Which AWS service can be used to achieve this?
⚠ Common exam trap
The ANS-C01 exam often tests the misconception that security groups can filter by domain names because they are stateful and support DNS names in rules, but in reality, security groups only support IP-based rules and cannot resolve or filter by FQDNs.
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 the correct choice because it provides stateful, managed firewall rules that can inspect and filter outbound traffic based on domain names (FQDN) for HTTPS (port 443) using TLS inspection or domain list rules. This allows you to create a rule group that permits outbound HTTPS traffic only to a specified list of domains, while blocking all other outbound traffic.
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 can filter outbound traffic by domain name using stateful rules.
- ✗
Security groups
Why it's wrong here
Security groups cannot filter by domain name; they use IP addresses.
- ✗
Amazon Route 53
Why it's wrong here
Route 53 is a DNS service, not a firewall.
- ✗
Application Load Balancer
Why it's wrong here
ALB is for inbound traffic distribution.
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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.