With the Default DNS option, Oracle automatically creates and manages the private DNS configuration associated with the Exadata VM Cluster. The generated database networking domain uses the oraclevcn.com suffix.
The Single Client Access Name (SCAN) listener and database-node FQDNs are registered within this Oracle-managed private DNS domain. OCI hosts the corresponding private DNS zone and, as part of the Oracle AI Database@Azure integration, the service replicates the required DNS records into a matching Azure Private DNS zone. Azure then links that private zone to the VNet hosting the Oracle database deployment, allowing Azure applications to resolve the Oracle database endpoints privately.
oraclecloud.com is broadly used for Oracle public cloud endpoints but is not the default private VCN suffix for the Exadata SCAN name. azure-database.net and oci-exadata.com are likewise not the default suffixes used by this Oracle-managed DNS architecture.
Therefore, D. oraclevcn.com is correct.
Study Guide reference: Configure Oracle AI Database@Azure Networking — Exadata default DNS, SCAN and Azure Private DNS replication.
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