A company has multiple IPv4 Site-to-Site VPNs using virtual private gateways between its on-premises environment and several VPCs. Internal applications are experiencing high latency on the VPN paths. What solution will resolve the excessive latency?

Deploying a transit gateway with an accelerated Site-to-Site VPN connection is the correct solution because AWS VPN Accelerator, a feature of AWS Global Accelerator, can be enabled on VPN connections attached to a Transit Gateway. This leverages the AWS global network backbone to route traffic over optimized paths, significantly reducing latency for VPN traffic between on-premises environments and AWS VPCs. Using AWS Global Accelerator directly on existing virtual private gateway VPNs is not supported; Global Accelerator works with endpoints like EC2 instances, Network Load Balancers, or Application Load Balancers, or with VPNs attached to a Transit Gateway. Replacing with IPv6 VPNs would not inherently reduce latency, as the underlying network path optimization is the key factor. AWS PrivateLink is designed for private connectivity to AWS services, not for general Site-to-Site VPN connectivity to VPCs.