SAP-C02 Practice Question: Design Solutions for Organizational Complexity
A company has a global AWS environment with multiple VPCs in different regions. The company uses AWS Transit Gateway to connect VPCs in the same region, but they need to interconnect VPCs across regions. The network team wants a solution that provides transitive routing across regions with minimal latency and operational overhead. Which solution should be implemented?
⚠ Common exam trap
Many exam-takers confuse Transit Gateway peering with VPN or Direct Connect, assuming that cross-region connectivity requires a VPN or dedicated line, but AWS provides a native, managed peering feature that is simpler and more performant for inter-region Transit Gateway connectivity.
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 peering attachments between Transit Gateways in different regions.
Transit Gateway peering attachments enable transitive routing between Transit Gateways in different AWS regions, providing low-latency connectivity over the AWS global network without requiring VPN or Direct Connect. This solution minimizes operational overhead because AWS manages the peering connection and route propagation automatically, allowing VPCs attached to different Transit Gateways to communicate across regions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set up a VPN connection between Transit Gateways in different regions.
Why it's wrong here
VPN adds encryption overhead and may increase latency.
- ✗
Use AWS Direct Connect to connect the Transit Gateways in different regions.
Why it's wrong here
Direct Connect is for on-premises to AWS, not inter-region.
- ✗
Create VPC peering connections between all VPCs in different regions.
Why it's wrong here
VPC peering is not transitive and requires many connections.
- ✓
Use Transit Gateway peering attachments between Transit Gateways in different regions.
Why this is correct
Transit Gateway peering provides transitive routing across regions with low latency.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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