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

Objective: Improve OCI-AWS data transfer performance.

Option A: Region distance affects latency—valid.

Option B: Dedicated interconnect boosts bandwidth and stability—valid.

Option C: Compute pricing doesn’t influence inter-cloud bandwidth—invalid.

Option D: WAN optimization can enhance transfer efficiency—valid.

Conclusion: Option C is not a design consideration for performance.

Oracle notes:

"To optimize OCI-AWS connectivity, consider region proximity, dedicated interconnects, or WAN optimization. Compute pricing is unrelated to network performance."This excludes Option C. Reference:Hybrid Cloud Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/hybridcloud.htm).

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.

Objective:Grant requesting tenancy permission to initiate an RPC to the target tenancy.

RPC Process:Requires the requesting tenancy to create and connect the RPC, which needs specific IAM permissions in the target tenancy.

IAM Verbs:

manage:Broad permissions, too permissive for RPC initiation.

use:Allows creation and connection of RPCs, precise for this task.

inspect:Read-only, insufficient for initiating connections.

read:Read-only, insufficient for initiating connections.

Evaluate Options:

A:Too broad, includes unnecessary permissions; incorrect.

B:Precise permission for RPC initiation; correct.

C:Read-only, doesn’t allow connection; incorrect.

D:Read-only, doesn’t allow connection; incorrect.

Conclusion:"use remote-peering-connections" is the essential policy.

RPCs require specific IAM policies for cross-tenancy connectivity. The Oracle Networking Professional study guide states, "To initiate a Remote Peering Connection, the requesting tenancy needs an IAM policy with the 'use remote-peering-connections' verb targeting the acceptor tenancy’s OCID" (OCI Networking Documentation, Section: Remote Peering Connections). This ensures controlled access for connection establishment.

Analyze Connectivity Successes:Instance A can ping its subnet gateway (10.0.1.1), indicating that local subnet routing and security rules are functioning for IPv4. It can also ping Instance B’s IPv6 address (fc00:1:2::20), confirming that IPv6 routing and security rules between subnets are operational.

Identify the Failure:Instance A cannot ping Instance B’s IPv4 address (10.0.2.20). Since security lists and NSGs allow all traffic, the issue is unlikely to be a security configuration problem.

Examine Routing for Instance A:The route table for Instance A’s subnet (10.0.1.0/24) has a rule directing traffic to 10.0.2.0/24 via the VCN Local Peering Gateway (LPG). In OCI, LPGs are used for intra-region VCN peering, but here, both instances are in the same VCN, so this rule is likely a misconfiguration or irrelevant unless peering is involved. However, the successful IPv6 ping suggests basic connectivity exists.

Check Return Path from Instance B:For a ping to succeed, Instance B must send ICMP replies back to Instance A (10.0.1.10). Instance B’s subnet (10.0.2.0/24) needs a route table entry to send traffic to 10.0.1.0/24. Without this, replies are dropped, causing the IPv4 ping to fail. The IPv6 success indicates that IPv6 routing is correctly configured both ways, possibly via SLAAC or default routes.

Evaluate Options:

A:Incorrect. IPv6 is enabled, as Instance A pings Instance B’s IPv6 address.

B:Correct. Missing route for 10.0.1.0/24 in Instance B’s subnet prevents IPv4 replies.

C:Incorrect. Security lists and NSGs can filter IPv6 traffic in OCI.

D:Incorrect. Ping supports IPv6, as evidenced by the successful IPv6 ping.

The most probable cause is a missing route in Instance B’s subnet route table. In OCI, each subnet has its own route table, and for instances in different subnets within the same VCN to communicate, both subnets must have appropriate routes. The successful IPv6 ping suggests that IPv6 routing is intact (likely due to default behavior or SLAAC), but IPv4 requires explicit routing. Per the Oracle Networking Professional study guide, "Route tables must be configured to direct traffic to the appropriate next hop for inter-subnet communication within a VCN" (OCI Networking Documentation, Section: Virtual Cloud Networks).

Objective: Identify the feature for dynamic route learning via DRG.

Option A: Service Gateway is for OCI services—incorrect.

Option B: LPG is for VCN peering—incorrect.

Option C: BGP enables dynamic route exchange between DRG and on-premises—correct.

Option D: Internet Gateway is for public access—incorrect.

Conclusion: Option C is the correct feature.

Oracle notes:

"BGP on the DRG dynamically learns routes from on-premises networks over FastConnect or VPN, propagating them to VCNs."This confirms Option C. Reference:BGP with DRG - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingDRGs.htm#BGP).

Requirements:App tier (public) needs internet; DB tier (private) must not.

Components:

Internet Gateway:Full internet access for public subnets.

NAT Gateway:Outbound-only internet for private subnets.

Service Gateway:Private OCI service access.

Evaluate Options:

A:Reversed roles; public subnet doesn’t need Service Gateway; incorrect.

B:NAT for public is unnecessary with Internet Gateway; inefficient.

C:NAT for public is wrong; Service Gateway doesn’t block DB internet; incorrect.

D:Internet Gateway for app, NAT for DB if needed, aligns with policy; correct.

Conclusion:Option D is most secure and efficient.

Subnet roles dictate gateway use. The Oracle Networking Professional study guide states, "Public subnets use an Internet Gateway for full internet access, while private subnets can use a NAT Gateway for outbound-only access, ensuring no direct internet exposure" (OCI Networking Documentation, Section: VCN Gateways). Option D balances security and functionality.

Needs: Secure, reliable hybrid multicloud access.

Option A: Multiple VPNs are secure but complex and less reliable over internet—less optimal.

Option B: Public internet with app security is insecure—incorrect.

Option C: FastConnect to OCI provides a private base; SD-WAN extends securely to AWS/Azure with encryption and HA—correct.

Option D: FastConnect to OCI with VPNs to others risks OCI as a single point of failure—less reliable.

Conclusion: Option C is the most secure and reliable.

Oracle advises:

"For hybrid multicloud, use FastConnect for primary connectivity and SD-WAN to extend securely to other clouds with encryption and policy control."This supports Option C. Reference:Multicloud Best Practices - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm#bestpractices).

Objective: Identify the OCI resource for private, low-latency VCN-to-VCN connectivity in the same region.

Option A: DRG connects VCNs to external networks (e.g., on-premises) or across regions, not for same-region peering—incorrect.

Option B: LPG is designed for private peering of VCNs within the same region, ensuring low-latency communication—correct.

Option C: Internet Gateway provides public internet access, not private connectivity—incorrect.

Option D: Service Gateway connects VCNs to OCI services, not other VCNs—incorrect.

Conclusion: Option B is the appropriate resource.

Oracle documentation states:

"A Local Peering Gateway (LPG) enables private connectivity between two VCNs in the same region, providing direct, low-latency communication."This confirms Option B. Reference:Local VCN Peering Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/localVCNpeering.htm).