What is the MOST operationally efficient solution to connect the VPCs?
Set up VPC peering connections between each VPC. Update each associated subnet’s route table
Configure a NAT gateway and an internet gateway in each VPC to connect each VPC through the internet
Create an AWS Transit Gateway in the networking team’s AWS account. Configure static routes from each VPC.
Deploy VPN gateways in each VPC. Create a transit VPC in the networking team’s AWS account to connect to each VPC.
Explanations:
VPC peering requires a separate connection for each pair of VPCs, which becomes unmanageable as the number of VPCs increases. It also lacks scalability and centralized management.
Using a NAT gateway and internet gateway to connect VPCs over the internet is not secure and introduces latency and potential issues with data privacy. This approach is not optimal for inter-VPC communication.
An AWS Transit Gateway provides a scalable and efficient way to connect multiple VPCs across different AWS accounts. It simplifies management by allowing all VPCs to connect to a central hub, reducing the complexity of routing and making it easier to manage connections across hundreds of accounts.
Deploying VPN gateways and creating a transit VPC introduces additional complexity and management overhead. This solution is less efficient than using a Transit Gateway, as it requires managing multiple VPN connections and may incur higher costs.