Quick Answer
The answer is AWS Firewall Manager, the correct choice because it is specifically designed to centrally manage network firewall rules across AWS accounts and VPCs through a single, unified policy. Unlike AWS Network Firewall, which operates on a per-VPC basis and requires individual configuration, Firewall Manager integrates with AWS Organizations to apply and enforce firewall policies—including rules from AWS Network Firewall, AWS WAF, and AWS Shield Advanced—across all accounts in your organization. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, this question tests your understanding of centralized security governance versus per-resource services; a common trap is confusing Firewall Manager with Network Firewall itself. Remember that Firewall Manager is the *manager* of policies, not the firewall engine—think of it as the “policy cop” that enforces rules across accounts, while Network Firewall is the “local guard” for a single VPC. A useful memory tip: “FM for the family (all accounts), NF for the neighborhood (one VPC).”
This ANS-C01 practice question tests your understanding of network security, compliance and governance. 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 uses AWS Organizations and has multiple VPCs in different accounts. They want to centrally manage network firewall rules for all VPCs using a single firewall policy. Which AWS service should they use?
AWS Firewall Manager
Centrally manages firewall policies across accounts.
AWS WAF
Why wrong: Web application firewall, not network firewall.
AWS Network Firewall
Why wrong: Operates within a single VPC.
AWS Shield Advanced
Why wrong: DDoS protection, not firewall management.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Firewall Manager
Option A is correct. AWS Firewall Manager allows you to centrally manage firewall rules across accounts and VPCs. Option B is wrong because Network Firewall is a per-VPC service. Option C is wrong because Shield is for DDoS. Option D is wrong because WAF is for web ACLs, not network firewalls.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS Firewall Manager
Why this is correct
Centrally manages firewall policies across accounts.
Related concept
Standard ACLs match source addresses.
AWS WAF
Why it's wrong here
Web application firewall, not network firewall.
AWS Network Firewall
Why it's wrong here
Operates within a single VPC.
AWS Shield Advanced
Why it's wrong here
DDoS protection, not firewall management.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
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.
What to study next
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related ANS-C01 ACL questions on filtering logic and placement.
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FAQ
Network Security, Compliance and Governance — This question tests Network Security, Compliance and Governance — Standard ACLs match source addresses..
The correct answer is: AWS Firewall Manager — Option A is correct. AWS Firewall Manager allows you to centrally manage firewall rules across accounts and VPCs. Option B is wrong because Network Firewall is a per-VPC service. Option C is wrong because Shield is for DDoS. Option D is wrong because WAF is for web ACLs, not network firewalls.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related ANS-C01 ACL questions on filtering logic and placement.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 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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