Which solution meets these requirements?
Provision a Direct Connect gateway. Delete the existing private virtual interface from the existing connection. Create the second Direct Connect connection. Create a new private virtual interface on each connection, and connect both private virtual interfaces to the Direct Connect gateway. Connect the Direct Connect gateway to the single VPC.
Keep the existing private virtual interface. Create the second Direct Connect connection. Create a new private virtual interface on the new connection, and connect the new private virtual interface to the single VPC.
Keep the existing private virtual interface. Create the second Direct Connect connection. Create a new public virtual interface on the new connection, and connect the new public virtual interface to the single VPC.
Provision a transit gateway. Delete the existing private virtual interface from the existing connection. Create the second Direct Connect connection. Create a new private virtual interface on each connection, and connect both private virtual interfaces to the transit gateway. Associate the transit gateway with the single VPC.
Explanations:
Provisioning a Direct Connect gateway allows for redundancy and multi-region connectivity. By connecting both private virtual interfaces to the Direct Connect gateway, the solution meets the requirement of having a redundant connection while enabling connectivity to other regions in the future.
While this option adds a second Direct Connect connection, it does not utilize a Direct Connect gateway, which is necessary for redundancy and multi-region connectivity. This configuration would be limited to the single VPC and does not prepare for expansion.
Creating a public virtual interface does not meet the requirement for private connectivity to the VPC. This option does not address redundancy or future multi-region needs, as it focuses solely on public connectivity.
While provisioning a transit gateway is a good practice, deleting the existing private virtual interface is unnecessary. Also, a transit gateway is not required for direct connections to a single VPC when a Direct Connect gateway would be more appropriate for achieving redundancy and multi-region connectivity.