Which solution meets these requirements?
Configure three AWS Site-to-Site VPN connections from the data center to AWS. Establish connectivity by configuring one VPN connection for each VPC.
Launch a third-party virtual network appliance in each VPC. Establish an IPsec VPN tunnel between the data center and each virtual appliance.
Set up three AWS Direct Connect connections from the data center to a Direct Connect gateway in us-east-1. Establish connectivity by configuring each VPC to use one of the Direct Connect connections.
Set up one AWS Direct Connect connection from the data center to AWS. Create a transit gateway, and attach each VPC to the transit gateway. Establish connectivity between the Direct Connect connection and the transit gateway.
Explanations:
Configuring three AWS Site-to-Site VPN connections would result in separate connections for each VPC. This solution may lead to increased latency and complexity, as each VPC would need its own VPN configuration. Furthermore, VPN connections can have limited bandwidth compared to Direct Connect, which may not effectively handle the hundreds of gigabytes of data required daily.
Launching a third-party virtual network appliance in each VPC and establishing IPsec VPN tunnels could add significant complexity and cost. This solution requires management of additional appliances and their associated costs. Moreover, it may not provide the necessary bandwidth and low latency required for transferring large amounts of data to the on-premises data center.
Setting up three AWS Direct Connect connections for each VPC to a Direct Connect gateway may provide a high bandwidth solution; however, it can be unnecessarily costly and complex. Managing three separate connections for the same data center does not maximize cost-effectiveness, as a single connection could be utilized more efficiently.
Establishing one AWS Direct Connect connection to a transit gateway allows for efficient routing of traffic between the on-premises data center and all attached VPCs. This solution maximizes cost-effectiveness by leveraging a single Direct Connect connection for high bandwidth and low latency, meeting the requirements of transferring large volumes of data while simplifying network management.
I arrange that the answer is:
Set up one AWS Direct Connect connection from the data center to AWS. Create a transit gateway, and attach each VPC to the transit gateway. Establish connectivity between the Direct Connect connection and the transit gateway.