VPC to Customer premises:
AWS Direct Connect or
VPN connections from on-premises
connecting VPCs in different AWS Regions using either
AWS-managed networks or
non-AWS networks ( Private network/Internet-ISP = AWS Direct Connect or VPN connection )
AWS Direct Connect or
VPN connections from on-premises
AWS-managed networks or
non-AWS networks ( Private network/Internet-ISP = AWS Direct Connect or VPN connection )