1z0-1124-25 Exam Dumps : Oracle Cloud Infrastructure 2025 Networking Professional

Objective:Enable transitive routing via a network appliance (e.g., firewall) between VCNs.

Transitive Routing Setup:DRG connects VCNs; appliance processes traffic.

Key Requirement:DRG must route traffic to the appliance’s private IP.

Evaluate Options:

A:Service Gateway is for OCI services, not transitive routing; incorrect.

B:Static routes on DRG to appliance ensure correct traffic flow; essential.

C:Load Balancer is optional, not essential for routing; incorrect.

D:LPG is for intra-region VCN peering, not appliance-DRG connection; incorrect.

Conclusion:DRG static routes to the appliance are critical for transitive routing.

Transitive routing with a network appliance requires explicit routing configuration. The Oracle Networking Professional study guide notes, "To enable transitive routing through a network appliance, configure static routes in the DRG route table pointing to the appliance’s private IP as the next hop" (OCI Networking Documentation, Section: Transitive Routing with DRG). This ensures traffic is processed by the appliance between VCNs.

Problem:DNSSEC validation fails post-setup.

DNSSEC Chain:Requires DS record in parent zone for trust.

Evaluate Causes:

A:Low TTL affects caching, not validation; unlikely.

B:Missing DS in parent zone breaks chain; most likely.

C:Resolver config is client-side, not affecting external tools; incorrect.

D:OCI uses standard algorithms; highly unlikely.

Conclusion:Registrar delay in publishing DS is the primary cause.

DNSSEC relies on the parent zone. The Oracle Networking Professional study guide explains, "DNSSEC validation fails if the registrar hasn’t published the DS record in the parent zone, as this breaks the chain of trust" (OCI Networking Documentation, Section: DNSSEC Troubleshooting). This is a common post-enablement issue.

Requirement:Transitive routing across regions and to on-premises, privately.

Components:

LPG:Intra-region VCN peering; limited scope.

DRG:Cross-region and on-premises routing via private backbone.

Service Gateway:OCI service access; not transitive.

Internet Gateway:Public internet; not private.

Evaluate Options:

A:Region-specific; incorrect.

B:Supports multi-region and on-premises; correct.

C:Service-focused; incorrect.

D:Public; incorrect.

Conclusion:DRG is the key component.

DRG enables complex routing scenarios. The Oracle Networking Professional study guide notes, "The Dynamic Routing Gateway (DRG) facilitates transitive routing between VCNs in different regions and on-premises networks over OCI’s private backbone" (OCI Networking Documentation, Section: Dynamic Routing Gateway). This meets both requirements efficiently.