A company has 50 VPCs across multiple AWS Regions. The company needs to establish network connectivity between all VPCs. Which solution provides the MOST scalable and high-performing architecture with the LEAST operational overhead?

Answer options:

VPC Peering

AWS Transit Gateway

AWS VPN CloudHub

AWS Direct Connect

How to approach this question

When you see 'many VPCs' (more than 3-5) and 'least operational overhead', the answer is always Transit Gateway.

Full Answer

B.AWS Transit Gateway✓ Correct

AWS Transit Gateway

AWS Transit Gateway connects VPCs and on-premises networks through a central hub. This simplifies your network and puts an end to complex peering relationships. It acts as a highly scalable cloud router—each new connection is only made once.

Common mistakes

Choosing VPC Peering, which does not scale well for a large number of VPCs due to the lack of transitive routing.

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