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

Goal: Restrict subnet traffic to a specific on-premises IP range via FastConnect.

Option A: Internet Gateway is for public access, not FastConnect—incorrect.

Option B: Default security list applies broadly, lacking granularity; NSGs are more effective—less optimal.

Option C: Custom route table with DRG ensures FastConnect routing; NSGs provide precise, instance-level traffic restriction—correct.

Option D: LPG is for same-region VCN peering, not on-premises—incorrect.

Conclusion: Option C is the most effective method.

Oracle notes:

"Use a custom route table with a DRG route rule for FastConnect traffic. NSGs offer granular control to restrict traffic to specific IP ranges."This supports Option C. Reference:FastConnect and NSG Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm & docs.oracle.com/en-us/iaas/Content/Network/Concepts/NSGs.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).

Needs: Private, dedicated connection for large data transfers to Object Storage.

Option A: VPN with Service Gateway uses public internet, limiting bandwidth—incorrect.

Option B: Internet Gateway exposes traffic publicly—incorrect.

Option C: FastConnect Private Peering provides a dedicated link, and Service Gateway ensures private Object Storage access—correct.

Option D: DRG with Internet Gateway isn’t private—incorrect.

Conclusion: Option C best meets the need.

Oracle states:

"FastConnect Private Peering combined with a Service Gateway enables secure, high-bandwidth access to Object Storage from on-premises networks."This supports Option C. Reference:FastConnect and Service Gateway - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#servicegateway).

Requirement Analysis:The solution must ensure private access to Object Storage without public internet traversal, while being cost-effective.

Evaluate OCI Components:

Internet Gateway:Provides public internet access, unsuitable for private connectivity.

NAT Gateway:Allows outbound internet access from private subnets, but traffic still exits OCI.

Service Gateway:Enables private access to OCI services like Object Storage within the same region.

DRG with FastConnect:Used for on-premises connectivity, not intra-OCI service access.

Option Assessment:

A:Uses public internet, violating the security policy.

B:HTTPS encrypts data, but traffic traverses the internet via NAT, violating the policy.

C:Service Gateway keeps traffic within OCI’s private network, meeting security and cost goals.

D:Overly complex and costly, with public endpoints contradicting the requirement.

Conclusion:Service Gateway with regional Object Storage endpoints ensures private, secure, and cost-effective access.

The Service Gateway is designed for private access to OCI services like Object Storage, avoiding the public internet. The Oracle Networking Professional study guide states, "A Service Gateway allows instances in a private subnet to access supported OCI services without an Internet Gateway or NAT Gateway, ensuring traffic remains within the Oracle network" (OCI Networking Documentation, Section: Service Gateway). Using the Oracle Services Network service CIDR label for the region ensures compatibility with Object Storage endpoints, optimizing cost and security.

Goal: Ensure optimal performance in connectivity strategy.

Option A: Low setup cost may compromise performance—incorrect.

Option B: Proximity affects latency; ignoring it harms performance—incorrect.

Option C: Matching bandwidth to app needs ensures performance—correct.

Option D: Limiting to managed solutions restricts options—incorrect.

Conclusion: Option C is the key consideration.

Oracle advises:

"Consider application bandwidth requirements and peak loads when selecting a connectivity strategy for optimal performance during migration.”This supports Option C. Reference:Network Planning for Migration - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/migration.htm#planning).

Zero Trust Principles:Require explicit, identity-based access controls at every network stage.

Evaluate OCI Services:

Internet Gateway:Enables public internet access, no identity-based control.

Service Gateway:Provides private service access, no granular routing control.

NSGs:Offer stateful, identity-based rules at the VNIC level.

DRG:Facilitates routing, not identity-based access control.

NSG Fit:NSGs allow rules based on VNIC identity, source/destination IP, and ports, aligning with Zero Trust.

Conclusion:NSGs are the best fit for granular, identity-based routing control.

NSGs are pivotal for Zero Trust in OCI. The Oracle Networking Professional study guide states, "Network Security Groups provide granular, stateful security rules that can be applied to specific VNICs, enabling identity-based access controls essential for Zero Trust architectures" (OCI Networking Documentation, Section: Network Security Groups). Unlike security lists (subnet-level), NSGs offer instance-level precision.

Understand the Requirement: The goal is high availability (HA) and automatic failover for a Site-to-Site VPN between an on-premises network and OCI with minimal disruption.

Evaluate Option A: A single VPN connection with one tunnel lacks redundancy. If the tunnel fails, there’s no failover mechanism, as OCI doesn’t inherently provide automatic failover for a single tunnel. This is a single point of failure.

Evaluate Option B: A single VPN connection with two tunnels using different CPE IP addresses leverages OCI’s IPSec VPN capabilities. OCI supports multiple tunnels per VPN connection, and using distinct CPE IPs (e.g., via different ISPs or devices) ensures that if one tunnel fails (due to ISP or CPE failure), the second tunnel remains active. OCI’s Dynamic Routing Gateway (DRG) automatically reroutes traffic to the active tunnel using IKE and IPSec health checks.

Evaluate Option C: Two separate VPN connections, each with one tunnel and different CPE IPs, also provide HA. Using BGP, routes are advertised redundantly. However, managing two VPN connections is more complex than a single connection with two tunnels, and BGP failover might introduce slight delays compared to IPSec tunnel failover.

Evaluate Option D: Two tunnels with the same CPE IP address within one VPN connection don’t provide true HA. If the CPE or its ISP fails, both tunnels fail, as they share a single point of failure.

Conclusion: Option B is the simplest, most resilient configuration that ensures automatic failover with minimal disruption using OCI’s native VPN capabilities.

OCI’s Site-to-Site VPN supports multiple tunnels within a single IPSec connection for redundancy. According to the Oracle Help Center:

"You can configure multiple tunnels for a single IPSec connection to provide redundancy. OCI uses IKE (Internet Key Exchange) to monitor tunnel health and automatically fails over to an active tunnel if one becomes unavailable."

"For maximum availability, use different CPE public IP addresses for each tunnel (e.g., different ISPs or devices)."This aligns with Option B, ensuring HA without the complexity of separate VPN connections or BGP. Reference:Site-to-Site VPN Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm).

Requirement Analysis: Strict compliance mandates logging all user access to private resources in a multi-tier setup.

Option A Assessment: Dynamic port forwarding with no logging fails compliance, as it provides no audit trail.

Option B Assessment: Managed Bastion sessions in OCI offer detailed logging (e.g., session start/end times, user IDs), integrated with OCI Logging. This meets compliance needs with a managed, scalable solution.

Option C Assessment: SSH port forwarding with minimal logs doesn’t provide the detailed auditing required for strict compliance.

Option D Assessment: A jump server with manual logging is error-prone, lacks scalability, and isn’t a managed OCI service, making it less suitable.

Conclusion: Option B provides the most robust, compliance-ready solution with detailed logging.

From Oracle’s Bastion documentation:

"OCI Bastion provides managed SSH sessions with detailed logging capabilities, capturing user access details for audit and compliance. Enable session logging to record all activities."This supports Option B as the best choice. Reference:Bastion Service Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Bastion/Concepts/bastionoverview.htm).