An application running on an Amazon EC2 instance in VPC-A needs to access files on another EC2 instance in VPC-B. Both VPCs are in separate AWS accounts. The network administrator must design a secure solution to allow EC2 in VPC-A to access the EC2 in VPC-B. The connectivity should avoid a single point of failure and not have bandwidth concerns. Which solution will meet these requirements?

VPC peering allows private IP address communication between instances in different VPCs, even across different AWS accounts, as if they were in the same network. This solution is highly available and scalable, avoiding single points of failure and bandwidth limitations inherent in other approaches. VPC gateway endpoints are for connecting to AWS services, not between EC2 instances in different VPCs. Attaching a virtual private gateway is typically used for VPN connections to on-premises networks, not direct VPC-to-VPC communication. A private virtual interface (VIF) is part of AWS Direct Connect, used for private connectivity from on-premises to AWS, not for inter-VPC communication.