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

Objective:Enable DNSSEC to secure OCI DNS against spoofing.

DNSSEC Process:Requires enabling on the zone, generating keys, and updating the registrar.

Evaluate Options:

A:Steering policies manage traffic, not DNSSEC; incorrect.

B:OCI DNS auto-generates keys; manual upload unnecessary; incorrect.

C:Enabling DNSSEC starts the process, provides DS record; correct first step.

D:Resolver validation is client-side, not enabling DNSSEC; incorrect.

Conclusion:Enabling DNSSEC on the zone is the critical first step.

DNSSEC setup begins at the zone level. The Oracle Networking Professional study guide states, "The first step to enable DNSSEC in OCI DNS is to activate it on the zone, which generates keys and provides a DS record to share with your registrar" (OCI Networking Documentation, Section: DNSSEC Configuration). This establishes the chain of trust.

Requirements: HA and redundancy for on-premises-to-OCI connectivity.

Option A: Single FastConnect lacks redundancy—incorrect.

Option B: Single VPN over internet has no redundancy and poor performance—incorrect.

Option C: Dual FastConnect with diverse paths ensures HA and redundancy via separate routes—correct.

Option D: Internet Gateway with public IPs isn’t dedicated or redundant—incorrect.

Conclusion: Option C is the recommended approach.

Oracle advises:

"For high availability, use dual FastConnect connections with diverse paths to eliminate single points of failure in hybrid connectivity."This supports Option C. Reference:FastConnect High Availability - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#ha).

Requirements: Secure, reliable, low-latency, bidirectional access with redundancy.

Option A: VPN via DRG is secure but lacks low latency and redundancy—insufficient.

Option B: FastConnect via DRG offers low latency and security but no redundancy—partial fit.

Option C: Public endpoints are insecure and high-latency—incorrect.

Option D: FastConnect for primary low-latency access, VPN as backup for redundancy—correct and most appropriate.

Conclusion: Option D meets all criteria.

Oracle states:

"FastConnect with DRG provides secure, low-latency hybrid connectivity. Add a Site-to-Site VPN for redundancy to ensure reliability."This supports Option D. Reference:Hybrid Cloud Connectivity - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/hybridcloud.htm).

Goal: Efficient, cost-optimized data transfer minimizing egress charges.

Option A: Public internet incurs high egress costs—incorrect.

Option B: Hub-and-spoke doubles egress/ingress charges—less efficient.

Option C: Third-party platform at peering points reduces egress by leveraging direct connections—correct.

Option D: Storage Gateway is for hybrid, not multicloud efficiency—incorrect.

Conclusion: Option C is the most efficient strategy.

Oracle states:

"A third-party integration platform at peering points minimizes egress charges by using direct interconnects for multicloud data transfers.”This validates Option C. Reference:Multicloud Cost Optimization - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm#costoptimization).

Goal: Private, secure, least-privilege access to Object Storage across subnets.

Option A: Internet Gateway uses public access, violating privacy—incorrect.

Option B: NAT Gateway is for internet, not OCI services—incorrect.

Option C: Service Gateway provides private access; IAM policies enforce least privilege; route tables manage traffic—correct.

Option D: Private Endpoints per bucket/subnet are inefficient and unscalable—incorrect.

Conclusion: Option C is efficient and secure.

Oracle states:

"A Service Gateway enables private access to Object Storage. Use IAM policies for least-privilege access and route tables for traffic control."This supports Option C. Reference:Service Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/servicegateway.htm).

Goal: Maximum security and isolation for IPSec over FastConnect.

Option A: Direct IPSec between on-premises networks bypasses OCI, ensuring complete isolation—correct and most secure.

Option B: NSGs/security lists control traffic but allow OCI traversal, less isolated—incorrect.

Option C: Third-party firewall adds complexity and OCI dependency, reducing isolation—incorrect.

Option D: Flow logs monitor, don’t isolate—incorrect.

Conclusion: Option A provides the highest isolation.

Oracle notes:

"For maximum isolation with third-party networks, configure IPSec directly between on-premises endpoints, avoiding OCI traversal."This supports Option A. Reference:IPSec over FastConnect - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm#fastconnect).

Goal: Secure, granular access control to ADB from private subnet instances.

Option A: Public endpoint with NSGs exposes ADB to the internet, increasing risk despite NSG restrictions—less secure than private options.

Option B: Service Gateway provides private access to OCI services, but it’s not specific to ADB instances and lacks the instance-level granularity of private endpoints.

Option C: Private ADB endpoint assigns a private IP within the VCN, keeping traffic internal. NSGs allow precise, stateful control to specific instances, offering the most granular security.

Option D: DRG is for external connections (e.g., on-premises), not internal VCN-to-ADB access.

Conclusion: Option C provides the most secure and granular control.

Oracle documentation notes:

"Private endpoints for Autonomous Database provide a private IP within your VCN, ensuring traffic stays off the public internet. Use NSGs for fine-grained access control to specific instances."This supports Option C. Reference:Autonomous Database Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Database/Tasks/adbconnecting.htm).

Requirements: Outbound internet access, no inbound exposure, and private OCIR access.

Option A: Internet Gateway allows inbound traffic, violating the no-exposure rule—incorrect.

Option B: NAT Gateway enables outbound-only internet access, but Internet Gateway adds inbound exposure—incorrect.

Option C: NAT Gateway provides outbound internet access without inbound exposure; Service Gateway enables private OCIR access—correct.

Option D: DRG is for external networks, not internet/OCIR access; Internet Gateway exposes servers—incorrect.

Conclusion: Option C satisfies all requirements.

Oracle states:

"Use a NAT Gateway for outbound internet access from private subnets without inbound connectivity. Use a Service Gateway for private access to OCI services like OCIR."This supports Option C. Reference:NAT and Service Gateway Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/NATgateway.htm & docs.oracle.com/en-us/iaas/Content/Network/Tasks/servicegateway.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).