ANS-C01 Network Implementation Practice Question
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?
⚠ Common exam trap
A common mix-up: candidates 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.
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.
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.
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.
- ✗
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.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.