ANS-C01 Network Management and Operations Practice Question
A network engineer is designing a multi-region architecture using AWS Transit Gateway and wants to minimize inter-region latency for data transfer between VPCs. The application requires high throughput and low latency. Which design should be used?
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
✓
Use Transit Gateway inter-region peering between Transit Gateways
Transit Gateway inter-region peering allows direct connectivity between Transit Gateways in different regions, using the AWS global backbone to minimize latency and maximize throughput. Option A (VPC peering) does not scale to multiple VPCs and regions. Option B (Site-to-Site VPN) introduces encryption overhead and potential latency. Option C (VPC endpoints) are for accessing AWS services, not for inter-VPC traffic. Therefore, Option D is the correct design for minimizing inter-region latency and achieving high throughput.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Establish VPC peering connections between all VPCs across regions
Why it's wrong here
VPC peering is not transitive and complex to manage.
- ✗
Use AWS Site-to-Site VPN between Transit Gateways in each region
Why it's wrong here
VPN adds encryption overhead and higher latency.
- ✗
Configure VPC endpoints to route traffic through AWS backbone
Why it's wrong here
VPC endpoints are for accessing AWS services, not inter-VPC.
- ✓
Use Transit Gateway inter-region peering between Transit Gateways
Why this is correct
This provides low-latency, high-throughput connectivity.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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