A product recommendation service runs in a VPC with CIDR 192.168.224.0/19, behind an NLB and Auto Scaling. The production environment is in a separate VPC with CIDR 192.168.128.0/17. The company must integrate the production environment with the recommendation service in 5 days with minimal disruption. Which solution meets this requirement with the least impact to existing environments?

Creating a VPC endpoint service and an interface VPC endpoint allows the production environment to privately access the recommendation service running behind an NLB without traversing the internet or requiring VPC peering. This solution offers the least impact because it doesn't alter the existing network CIDR ranges or routing within the production VPC, and it keeps the services logically separate while enabling secure, private communication. Redeploying the service into the production VPC would be disruptive and time-consuming. VPC peering is a viable option but requires careful management of overlapping CIDRs (which are not present here) and can become complex with many connections. A Transit Gateway is a robust solution for many VPCs but is overkill for connecting just two VPCs and introduces more complexity than an endpoint service for this specific use case.