The answer is to use AWS Firewall Manager to centrally define and apply security group policies across accounts. This is correct because Firewall Manager provides centralized security group management across accounts, enabling consistent network segmentation and rule enforcement across all VPCs in a hub-and-spoke model with AWS Transit Gateway, eliminating the operational overhead of manual scripting or per-account configuration. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of governance at scale—a common trap is confusing AWS Config (which only detects drift) with Firewall Manager (which enforces policies). Remember, Firewall Manager is the enforcement engine for security groups, while Config is the auditor. Memory tip: think “Firewall Manager = Firewall Mandate” for centralized rule enforcement.
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. 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 plans to migrate on-premises workloads to AWS. They have 500 VMs and need to ensure consistent network segmentation and security group rules across multiple VPCs in different AWS accounts. The network team uses a centralized hub-and-spoke model with AWS Transit Gateway. Which approach minimizes operational overhead while maintaining security compliance?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Firewall Manager to centrally define and apply security group policies across accounts.
Option D is correct because AWS Firewall Manager allows centralized management of security group rules across accounts and VPCs. Option A is wrong because manual scripting is error-prone. Option B is wrong because AWS Config does not enforce rules; it only detects drift. Option C is wrong because Network ACLs are stateless and not as granular as security groups.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use AWS Config rules to detect non-compliant security groups and send alerts.
Why it's wrong here
Alerts require manual remediation; does not prevent drift.
✗
Create a Python script that uses AWS SDK to apply security group rules to each VPC and run it periodically.
Why it's wrong here
Scripting is not scalable and requires constant maintenance.
✓
Use AWS Firewall Manager to centrally define and apply security group policies across accounts.
Why this is correct
Firewall Manager automates policy enforcement across all accounts.
Related concept
Standard ACLs match source addresses.
✗
Use network ACLs instead of security groups to enforce segmentation.
Why it's wrong here
NACLs are stateless and less flexible.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
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.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
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
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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 SAP-C02 ACL questions on filtering logic and placement.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use AWS Firewall Manager to centrally define and apply security group policies across accounts. — Option D is correct because AWS Firewall Manager allows centralized management of security group rules across accounts and VPCs. Option A is wrong because manual scripting is error-prone. Option B is wrong because AWS Config does not enforce rules; it only detects drift. Option C is wrong because Network ACLs are stateless and not as granular as security groups.
What should I do if I get this SAP-C02 question wrong?
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 SAP-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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