Oracle AI Database@Azure Architect Professional 1z0-1147 Question # 29 Topic 3 Discussion
1z0-1147 Exam Topic 3 Question 29 Discussion:
Question #: 29
Topic #: 3
What is the default CIDR block range used to create the backup subnet for an Exadata VM Cluster in Oracle AI Database@Azure if the field is left blank during provisioning?
During Exadata VM Cluster provisioning, the administrator selects the client delegated subnet and can explicitly provide a CIDR range for the Exadata backup network. If no backup-subnet CIDR is supplied, Oracle automatically uses the documented default of 192.168.252.0/22 .
The backup subnet serves Oracle database backup-network requirements and is architecturally distinct from the Azure delegated client subnet. Oracle's deployment-planning guidance emphasizes that the default backup CIDR is not part of the Azure VNet CIDR allocation. Nevertheless, address planning remains important. In disaster-recovery designs involving multiple Exadata deployments—especially cross-availability-zone or cross-region configurations—the administrator should explicitly choose non-overlapping backup CIDR blocks so that replication, routing, and backup traffic do not encounter conflicting address ranges.
Option B uses the correct network prefix but an incorrect /24 mask. Options A and D use different base networks and therefore do not match the Oracle provisioning default.
Accordingly, the correct response is C: 192.168.252.0/22 .
Study Guide reference: Configure Oracle AI Database@Azure Networking — Exadata VM Cluster client and backup networks, CIDR planning, default backup-subnet configuration and non-overlapping network design.
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