- A
Deploy AD in two Regions and use a VPN connection between the VPCs to replicate data.
Why wrong: VPN traffic would bypass the inspection VPC unless specifically routed, but the requirement mandates transit gateway.
- B
Deploy a single AD domain in one Region and use AD replication over a VPC peering connection to a second Region.
Why wrong: VPC peering does not support transitive routing through a third-party firewall in the transit gateway.
- C
Deploy AD in two Regions, attach both VPCs to the transit gateway, and enable cross-Region transit gateway peering. Use route tables to direct AD traffic through the inspection VPC.
Why wrong: Transit gateway peering does not support transitive routing through a third-party appliance in a different Region; traffic would go directly.
- D
Deploy AD in two Regions, attach both VPCs to a transit gateway in the primary Region, and use a transit gateway inter-Region peering attachment. Configure route tables to force traffic through the inspection VPC in the primary Region.
This ensures all inter-Region AD traffic is routed through the inspection VPC for firewall inspection.
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 multinational corporation is migrating its on-premises Active Directory (AD) to AWS Managed Microsoft AD. The company has a hub-and-spoke VPC topology with a central transit gateway. The AD domain controllers must be deployed in two different AWS Regions for disaster recovery. The corporate security policy requires that all AD traffic between Regions must traverse the transit gateway and be inspected by a third-party firewall appliance deployed in the inspection VPC. Which architecture meets these requirements?
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
Deploy AD in two Regions, attach both VPCs to a transit gateway in the primary Region, and use a transit gateway inter-Region peering attachment. Configure route tables to force traffic through the inspection VPC in the primary Region.
Option D is correct because it uses a transit gateway in the primary Region with an inter-Region peering attachment to the secondary Region, allowing AD traffic to be routed through the inspection VPC in the primary Region for firewall inspection. This meets the security policy requirement that all cross-Region AD traffic must traverse the transit gateway and be inspected by the third-party firewall appliance.
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.
- ✗
Deploy AD in two Regions and use a VPN connection between the VPCs to replicate data.
- ✗
Deploy a single AD domain in one Region and use AD replication over a VPC peering connection to a second Region.
- ✗
Deploy AD in two Regions, attach both VPCs to the transit gateway, and enable cross-Region transit gateway peering. Use route tables to direct AD traffic through the inspection VPC.
Why it's wrong here
Transit gateway peering does not support transitive routing through a third-party appliance in a different Region; traffic would go directly.
- ✓
Deploy AD in two Regions, attach both VPCs to a transit gateway in the primary Region, and use a transit gateway inter-Region peering attachment. Configure route tables to force traffic through the inspection VPC in the primary Region.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think cross-Region transit gateway peering alone satisfies the inspection requirement, but without explicit route table configuration to direct traffic through the inspection VPC, the traffic will bypass the firewall.
Detailed technical explanation
How to think about this question
AWS Transit Gateway inter-Region peering attachments use the AWS global network to route traffic between Regions, and route tables can be configured to force traffic through a Network Virtual Appliance (NVA) in an inspection VPC by using static routes or a default route pointing to the NVA. AD replication traffic uses Kerberos and LDAP over TCP/UDP ports 389, 636, 88, and 464, and the firewall must inspect these protocols; the transit gateway route tables must have a more specific route for the remote AD VPC CIDR pointing to the inspection VPC attachment, ensuring all cross-Region AD traffic flows through the firewall.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Design Solutions for Organizational Complexity — study guide chapter
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy AD in two Regions, attach both VPCs to a transit gateway in the primary Region, and use a transit gateway inter-Region peering attachment. Configure route tables to force traffic through the inspection VPC in the primary Region. — Option D is correct because it uses a transit gateway in the primary Region with an inter-Region peering attachment to the secondary Region, allowing AD traffic to be routed through the inspection VPC in the primary Region for firewall inspection. This meets the security policy requirement that all cross-Region AD traffic must traverse the transit gateway and be inspected by the third-party firewall appliance.
What should I do if I get this SAP-C02 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: Jun 11, 2026
This SAP-C02 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 SAP-C02 exam.
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