- A
Create a VPN connection from each business unit VPC to the shared services VPC.
Why wrong: VPNs add latency and reduce throughput compared to direct VPC connections via Transit Gateway.
- B
Deploy an AWS Transit Gateway and attach all VPCs (business unit and shared services) to it.
Transit Gateway acts as a hub for transitive routing, simplifying network management and providing high bandwidth.
- C
Use AWS PrivateLink to connect services in the shared services VPC to the business unit VPCs.
Why wrong: PrivateLink is for accessing specific services, not for general VPC-to-VPC routing; it does not provide full network connectivity.
- D
Set up VPC peering between each business unit VPC and the shared services VPC.
Why wrong: VPC peering does not support transitive routing; each pair must be explicitly peered and route tables updated, leading to complexity and potential routing issues.
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 global company uses AWS Organizations with multiple business units. Each business unit has its own OU and VPCs that need to communicate with a central shared services VPC. The network team wants to minimize latency and maximize throughput. Which design should they use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 an AWS Transit Gateway and attach all VPCs (business unit and shared services) to it.
AWS Transit Gateway acts as a hub-and-spoke router, allowing all VPCs (business units and shared services) to connect through a single gateway. This minimizes latency by using the AWS global network backbone and maximizes throughput with up to 50 Gbps per VPC attachment, scaling horizontally across multiple attachments. It simplifies management compared to mesh peering and avoids the bandwidth limitations of VPN or PrivateLink for inter-VPC routing.
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.
- ✗
Create a VPN connection from each business unit VPC to the shared services VPC.
Why it's wrong here
VPNs add latency and reduce throughput compared to direct VPC connections via Transit Gateway.
- ✓
Deploy an AWS Transit Gateway and attach all VPCs (business unit and shared services) to it.
Why this is correct
Transit Gateway acts as a hub for transitive routing, simplifying network management and providing high bandwidth.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS PrivateLink to connect services in the shared services VPC to the business unit VPCs.
Why it's wrong here
PrivateLink is for accessing specific services, not for general VPC-to-VPC routing; it does not provide full network connectivity.
- ✗
Set up VPC peering between each business unit VPC and the shared services VPC.
Why it's wrong here
VPC peering does not support transitive routing; each pair must be explicitly peered and route tables updated, leading to complexity and potential routing issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose VPC peering (D) due to its simplicity and zero additional cost, overlooking the management overhead and lack of transitive routing when scaling across many VPCs, while Transit Gateway provides a centralized, high-performance solution that aligns with the requirements for minimizing latency and maximizing throughput.
Detailed technical explanation
How to think about this question
AWS Transit Gateway uses a route table per attachment to control traffic flow, supporting transitive routing across all attached VPCs without needing individual peering connections. It leverages the AWS global infrastructure to keep traffic within the AWS network, avoiding internet or VPN hops, and supports multicast, inter-Region peering, and integration with Direct Connect Gateway for hybrid architectures. In practice, a company with hundreds of VPCs can use Transit Gateway to achieve sub-millisecond latency and 50 Gbps burst throughput per attachment, scaling to multiple transit gateways for redundancy.
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 an AWS Transit Gateway and attach all VPCs (business unit and shared services) to it. — AWS Transit Gateway acts as a hub-and-spoke router, allowing all VPCs (business units and shared services) to connect through a single gateway. This minimizes latency by using the AWS global network backbone and maximizes throughput with up to 50 Gbps per VPC attachment, scaling horizontally across multiple attachments. It simplifies management compared to mesh peering and avoids the bandwidth limitations of VPN or PrivateLink for inter-VPC routing.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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