How would you answer an interview scenario involving Azure Virtual Network in Microsoft Azure?

For an interview scenario involving Azure Virtual Network, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Azure Virtual Network provides private IP networking and segmentation for Azure resources. In this scenario, for a three-tier application using App Service, API, and Azure SQL, explain private connectivity, DNS, subnet design, and ingress/egress controls. For production, plan address space early, segment subnets by responsibility, use NSGs and route tables intentionally, prefer private endpoints for sensitive PaaS services, and document DNS behavior. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.