A company operates business applications on AWS, utilizing 50 AWS accounts, thousands of VPCs, and 3 AWS Regions spanning the United States and Europe. A network engineer must establish network connectivity between an on-premises data center and the AWS Regions, as well as enable connectivity between the VPCs. Users and applications on-premises must be able to access applications running in the VPCs. The company has an existing AWS Direct Connect connection available for use. The network engineer has created a transit gateway in each Region and configured them as inter-Region peers.

What solution will enable network connectivity from the on-premises data center to the AWS Regions and facilitate inter-VPC communication across the different Regions?