Oracle Updated 1z0-1124-25 Exam Questions and Answers by ayva

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.

Problem: Instances with IPv6-only traffic can’t ping external IPv6 addresses despite FastConnect and IPv6 prefixes.

Option A: OCI supports Bring Your Own IP (BYOIP) for IPv6, including global unicast addresses, so this is incorrect.

Option B: NAT Gateways are for IPv4 outbound traffic, not IPv6—irrelevant here.

Option C: For IPv6-only instances to reach external IPv6 addresses (beyond FastConnect),an Internet Gateway (IGW) is required with a default route (::/0) in the subnet route table. This enables public IPv6 connectivity—correct.

Option D: Service Gateway is for OCI services, not general IPv6 internet access—incorrect.

Conclusion: Option C fixes the issue by enabling IPv6 internet access.

Oracle states:

"To enable IPv6 traffic to the internet, attach an Internet Gateway to the VCN and add a route rule for ::/0. OCI supports BYOIP for public IPv6 prefixes."This aligns with Option C. Reference:IPv6 in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingIPv6.htm).

Context: Zero Trust assumes no trust, requiring strict isolation (micro-segmentation).

Option A: Bandwidth isn’t increased by segmentation—incorrect.

Option B: Segmentation may increase route tables for granularity, not reduce them—incorrect.

Option C: Micro-segmentation isolates workloads, limiting breach impact (blast radius)—core Zero Trust goal and correct.

Option D: Inter-region connectivity isn’t simplified by micro-segmentation—incorrect.

Conclusion: Option C aligns with Zero Trust principles.

Oracle notes:

"Micro-segmentation in OCI VCNs, using NSGs and security lists, limits the blast radius of breaches by isolating resources, a key Zero Trust principle."This supports Option C. Reference:Zero Trust in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/zerotrust.htm).

Requirements: Centralized DRG with tenant isolation.

Option A: Separate DRGs complicate management—incorrect.

Option B: NSGs work but are less secure than routing isolation—less optimal.

Option C: Single DRG with per-VCN route tables restricting routes to FastConnect only ensures isolation at the routing level—correct.

Option D: Compartments don’t isolate traffic at DRG—incorrect.

Conclusion: Option C is the most effective.

Oracle states:

"Use separate DRG route tables per VCN attachment to isolate traffic. Include only FastConnect routes to prevent VCN-to-VCN communication."This supports Option C. Reference:DRG Route Tables - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingDRGs.htm).