ANS-C01 Network Design Practice Question
A company is designing a multi-VPC architecture with VPC peering. They need to ensure that traffic between VPCs in different AWS Regions is encrypted. Which solution should they use?
⚠ Common exam trap
AWS often tests the misconception that VPC peering alone provides encryption, or that VPN attachments are required for inter-Region encryption, when in fact Transit Gateway inter-Region peering natively encrypts traffic without additional VPN layers.
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
✓
Transit Gateway inter-Region peering
Transit Gateway inter-Region peering is the correct solution because it provides encrypted traffic between VPCs in different AWS Regions natively, using the AWS global network infrastructure with automatic encryption at the transport layer. This feature supports transitive routing and does not require additional VPN tunnels or third-party appliances, making it the most efficient and scalable option for multi-region VPC connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Direct Connect gateway with VIFs
Why it's wrong here
Direct Connect is for on-premises, not VPC-to-VPC.
- ✗
Transit Gateway VPN attachments
Why it's wrong here
VPN attachments are for on-premises connectivity.
- ✗
VPC peering with VPN encryption
Why it's wrong here
VPC peering does not support inter-Region peering.
- ✓
Transit Gateway inter-Region peering
Why this is correct
Transit Gateway inter-Region peering encrypts traffic automatically.
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JA
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.