You have a single availability set that contains two SQL Server on Azure Virtual Machines instances.
The instances were deployed by using an Azure Marketplace SQL Server 2019 Enterprise image that has the latest cumulative updates applied. The instances are configured as the nodes of a failover cluster instance (FCI) named FCI1.
You need to ensure that client applications can connect to FCI1. The solution must meet the following requirements:
* Provide an availability SLA
* Minimize costs.
What should you create?
Correct Answer: C
Basic Concept: This question tests high availability and disaster recovery design for Azure SQL, SQL Server on Azure VMs, and regional failure scenarios.
Why C is Correct: a distributed network name (DNN) resource is correct because it is the feature whose normal purpose matches the stated requirement. a distributed network name (DNN) resource is part of the availability or recovery design space, but the correct choice must satisfy the specified failover, restore, quorum, RPO, or RTO requirement. The scenario wording points to that specific behavior: You need to ensure that client applications can connect to FCI1.
Why A is Wrong: a virtual network name (VNN) resource is part of the availability or recovery design space, but the correct choice must satisfy the specified failover, restore, quorum, RPO, or RTO requirement. It does not meet the failover, restore, quorum, or cross-region continuity target stated in the question, even if it is valid in a different availability design.
Why B is Wrong: a Basic Azure Load Balancer is part of the availability or recovery design space, but the correct choice must satisfy the specified failover, restore, quorum, RPO, or RTO requirement. It handles a different resilience pattern and would not deliver the failover or recovery behavior required here.
Why D is Wrong: an Azure Standard Load Balancer is part of the availability or recovery design space, but the correct choice must satisfy the specified failover, restore, quorum, RPO, or RTO requirement. It does not meet the failover, restore, quorum, or cross-region continuity target stated in the question, even if it is valid in a different availability design.