- A
AWS Network Firewall
Network Firewall can filter outbound traffic by domain name using stateful rules.
- B
Security groups
Why wrong: Security groups cannot filter by domain name; they use IP addresses.
- C
Amazon Route 53
Why wrong: Route 53 is a DNS service, not a firewall.
- D
Application Load Balancer
Why wrong: ALB is for inbound traffic distribution.
Question 551 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Security groups
Why it's wrong here
Security groups cannot filter by domain name; they use IP addresses.
- ✗
Amazon Route 53
- ✗
Application Load Balancer
Why it's wrong here
ALB is for inbound traffic distribution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Detailed technical explanation
How to think about this question
AWS Network Firewall uses Suricata-compatible rule groups that support domain name filtering via the 'domain' keyword in stateful rules, allowing you to specify FQDNs like 'example.com' for HTTPS traffic. Under the hood, it performs TLS inspection by decrypting the SNI (Server Name Indication) field in the TLS handshake to match domain names, or you can use a 'domain list' rule group for simpler allow/deny lists without deep packet inspection. In a real-world scenario, this is critical for enforcing corporate security policies, such as allowing only approved SaaS endpoints while blocking malicious or unauthorized outbound connections.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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.
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