- A
Deploy a software VPN appliance in the hub VPC and connect each spoke VPC with VPN tunnels.
Why wrong: Software VPNs have lower throughput and higher latency.
- B
Create VPC peering connections between the hub VPC and each spoke VPC.
VPC peering is cost-effective and high throughput for hub-and-spoke across regions.
- C
Establish Direct Connect connections from each VPC to a central on-premises location.
Why wrong: Direct Connect is expensive and not designed for VPC-to-VPC connectivity.
- D
Set up AWS Transit Gateway with attachments to each VPC.
Why wrong: Transit Gateway is not the most cost-effective for a small number of VPCs; VPC peering is cheaper.
Question 887 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.
An organization is migrating to AWS and needs to connect multiple VPCs in different AWS regions using a hub-and-spoke topology. The hub VPC will host centralized services. Which solution is most cost-effective and provides high throughput?
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
✓
Create VPC peering connections between the hub VPC and each spoke VPC.
Option B is correct because VPC peering connections provide high-throughput, low-latency connectivity between VPCs using the AWS global network, with no bandwidth limits and no single point of failure. For a hub-and-spoke topology with a limited number of VPCs, VPC peering is the most cost-effective solution as it incurs no hourly or per-GB data transfer charges beyond standard inter-region data transfer costs, unlike Transit Gateway which has hourly attachment fees. This makes it ideal for organizations migrating to AWS that need simple, direct connectivity without the complexity or cost of additional appliances or transit infrastructure.
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 a software VPN appliance in the hub VPC and connect each spoke VPC with VPN tunnels.
Why it's wrong here
Software VPNs have lower throughput and higher latency.
- ✓
Create VPC peering connections between the hub VPC and each spoke VPC.
Why this is correct
VPC peering is cost-effective and high throughput for hub-and-spoke across regions.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Establish Direct Connect connections from each VPC to a central on-premises location.
Why it's wrong here
Direct Connect is expensive and not designed for VPC-to-VPC connectivity.
- ✗
Set up AWS Transit Gateway with attachments to each VPC.
Why it's wrong here
Transit Gateway is not the most cost-effective for a small number of VPCs; VPC peering is cheaper.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose AWS Transit Gateway (Option D) because it is explicitly marketed for hub-and-spoke topologies, but they overlook the cost implications for small-scale deployments where VPC peering is more cost-effective and provides equivalent throughput.
Detailed technical explanation
How to think about this question
VPC peering uses the AWS global backbone to route traffic directly between VPCs without any intermediate hops, achieving line-rate throughput limited only by the instance's network bandwidth. However, VPC peering is not transitive—meaning in a hub-and-spoke design, spoke VPCs cannot communicate with each other through the hub unless explicit peering is established between spokes, which is a critical limitation for full mesh requirements. For inter-region peering, traffic stays on the AWS global network and incurs standard inter-region data transfer charges, but there is no per-connection fee, making it the cheapest option for a small number of VPCs.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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: Create VPC peering connections between the hub VPC and each spoke VPC. — Option B is correct because VPC peering connections provide high-throughput, low-latency connectivity between VPCs using the AWS global network, with no bandwidth limits and no single point of failure. For a hub-and-spoke topology with a limited number of VPCs, VPC peering is the most cost-effective solution as it incurs no hourly or per-GB data transfer charges beyond standard inter-region data transfer costs, unlike Transit Gateway which has hourly attachment fees. This makes it ideal for organizations migrating to AWS that need simple, direct connectivity without the complexity or cost of additional appliances or transit infrastructure.
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
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