Reference:
https://docs.microsoft.com/en-us/azure/dms/tutorial-sql-server-to-managed-instance Basic Concept: This question tests choosing the correct Azure migration approach by matching the source platform, target service, downtime tolerance, and administrative effort.
Why A is Correct: A service endpoint secures traffic to an Azure service over the Azure backbone but still targets the service public endpoint rather than giving it a private IP in the VNet. The scenario asks for: You need to configure VNET1 to support the migration. That makes Configure service endpoints. the option that satisfies the required Azure SQL layer and operational outcome.
Why B is Wrong: Configure virtual network peering. is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It would solve a neighboring problem, but not the deployment, sizing, or migration requirement in this item.
Why C is Wrong: Deploy an Azure firewall. is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It mismatches the target platform, migration method, compute tier, or deployment model described in the scenario, so it would not satisfy the workload as stated.
Why D is Wrong: Configure network security groups (NSGs). is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It applies to a different Azure data-platform design than the one the question is testing.