An Azure Web App connects to an Azure Cosmos DB account Cosmos1 through a private endpoint named Endpoint1 that uses default settings. To validate name resolution for Cosmos1, which DNS zone should you query?
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Correct answer: endpoint1.privatelink.documents.azure.com.
Why this is the answer
When an Azure Cosmos DB account uses a private endpoint, its private DNS zone follows the format privatelink.documents.azure.com. The specific private endpoint name, Endpoint1, will be a subdomain within this zone. Therefore, to validate name resolution for Cosmos1 through Endpoint1, you should query endpoint1.privatelink.documents.azure.com. The other options are incorrect because they represent private DNS zones for different Azure services: privatelink.blob.core.windows.net is for Azure Blob Storage. privatelink.azurewebsites.net is for Azure Web Apps. privatelink.database.azure.com is for Azure SQL Database or Azure Database for MySQL/PostgreSQL/MariaDB, not Cosmos DB.
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