A company hosts core network services, including directory services and DNS, in its on-premises data center. The data center connects to the AWS Cloud using AWS Direct Connect (DX). Additional AWS accounts will need quick, cost-effective, and consistent access to these on-premises services. What should a solutions architect implement to meet these requirements with the LEAST operational overhead?

AWS Transit Gateway is the most suitable solution because it centralizes network connectivity. By attaching the Direct Connect gateway to Transit Gateway, all connected AWS accounts can share the single DX connection to the on-premises data center. This provides quick, cost-effective, and consistent access with minimal operational overhead, as you manage one central connection point. Creating a DX connection in each new account is expensive and complex to manage. Configuring VPC endpoints is for AWS services, not for routing traffic to on-premises servers. Creating a VPN connection between each account and the DX VPC would increase operational overhead due to managing multiple VPNs and would not leverage the existing DX for all accounts efficiently.