Free Oracle 1Z0-1124-25 Exam Actual Questions & Explanations

Last updated on: Jun 15, 2026
Author: Hannah Ward (Oracle Cloud Infrastructure Certification Specialist)

The Oracle Cloud Infrastructure 2025 Networking Professional exam (1Z0-1124-25) validates your ability to design, deploy, and manage enterprise networking solutions on Oracle Cloud Infrastructure. This exam is intended for cloud architects, network engineers, and infrastructure professionals who work with OCI networking services. This resource guide helps you understand the exam scope, organize your study plan, and identify the key topics that matter most for passing with confidence.

1Z0-1124-25 Exam Syllabus & Core Topics

Use this topic map to guide your study for Oracle 1Z0-1124-25 (Oracle Cloud Infrastructure 2025 Networking Professional) within the Oracle Cloud and Oracle Cloud Infrastructure path.

  • Design and Deploy OCI Virtual Cloud Networks (VCN): Create and configure VCNs, subnets, and routing tables to support multi-tier application architectures. You must understand CIDR blocks, security lists, and network segmentation in production environments.
  • Plan and Design OCI Networking Solutions and App Services: Evaluate business requirements and translate them into OCI network designs. This includes selecting appropriate services, sizing capacity, and documenting design decisions for stakeholder review.
  • Design for Hybrid Networking Architectures: Connect on-premises infrastructure to OCI using site-to-site VPN, FastConnect, and other hybrid connectivity options. You must assess latency, bandwidth, and failover requirements for seamless integration.
  • Transitive Routing: Configure advanced routing scenarios where traffic flows through intermediate instances or appliances. Understand route table priorities, dynamic routing protocols, and how to troubleshoot routing loops.
  • Implement and Operate Secure OCI Networking and Connectivity Solutions: Apply security best practices including network segmentation, encryption, and access control. Configure firewalls, security lists, and network security groups to enforce least-privilege access.
  • Migrate Workloads to OCI: Plan and execute network migrations for existing applications and infrastructure. Address DNS cutover, traffic rerouting, and validation steps to ensure zero or minimal downtime.
  • Troubleshoot OCI Networking and Connectivity Issues: Diagnose and resolve common networking problems using OCI tools and logs. Interpret network performance metrics, identify misconfigurations, and apply corrective actions.

Question Formats & What They Test

The 1Z0-1124-25 exam measures both foundational knowledge and the ability to apply networking concepts to real-world scenarios. Questions progress in difficulty and require you to think through design trade-offs and operational decisions.

  • Multiple choice: Test recall of OCI networking features, service capabilities, and core terminology. Questions focus on definitions, default behaviors, and when to use specific services.
  • Scenario-based items: Present real-world situations where you must analyze requirements, evaluate options, and select the best design or troubleshooting approach. Examples include choosing between VPN and FastConnect, designing redundancy, or interpreting connectivity failures.
  • Configuration reasoning: Assess your understanding of how to configure VCNs, routing, security, and hybrid connections. You may need to identify misconfigurations or predict the outcome of a given setup.

Questions increase in complexity as you progress, rewarding candidates who combine theoretical knowledge with practical judgment.

Preparation Guidance

An efficient study plan maps each topic to a weekly goal, allowing you to build knowledge progressively and practice applying it to scenarios. Dedicate time to both conceptual understanding and hands-on configuration to reinforce learning.

  • Allocate one week per major topic area: VCN design, hybrid connectivity, security, and troubleshooting. Track completion and review weak areas before moving forward.
  • Work through practice question sets after each topic; read explanations carefully to understand why answers are correct and common misconceptions.
  • Connect related concepts across planning, design, and operations workflows. For example, understand how VCN design decisions affect security posture and hybrid connectivity options.
  • Complete a full-length timed practice test one week before your exam date. Use results to identify remaining gaps and refine your pacing strategy.
  • Review OCI documentation and architecture diagrams for complex topics like transitive routing and hybrid networking to solidify your mental models.

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Get the PDF & Practice Test

Strengthen your preparation with up-to-date resources from validexamdumps.com. These materials align to 1Z0-1124-25 and cover practical scenarios with clear explanations.

  • Q&A PDF with explanations: Topic-mapped questions that clarify why correct options are right and others aren't.
  • Practice Test: Realistic items, timed and untimed modes, progress tracking, and detailed review of every question.
  • Focused coverage: Aligned to VCN design, hybrid networking, security implementation, transitive routing, workload migration, and troubleshooting so you study what matters most.
  • Regular reviews: Content refreshes that reflect syllabus and product changes in Oracle Cloud Infrastructure.

Visit the exam page to download the PDF, Online Practice Test, or get a bundle discount for both formats: Oracle Cloud Infrastructure 2025 Networking Professional.

Frequently Asked Questions

What topics carry the most weight on the 1Z0-1124-25 exam?

VCN design, hybrid connectivity, and security implementation typically account for a significant portion of the exam. Transitive routing and troubleshooting also appear regularly. Focus your study time on these areas while ensuring you understand foundational concepts across all seven domains.

How do VCN design and hybrid networking connect in real projects?

VCN design establishes the foundation for your cloud infrastructure, while hybrid networking extends that design to include on-premises systems. In practice, you must design your VCN with hybrid connectivity in mind, considering IP address ranges, routing requirements, and security policies that span both environments. Understanding this relationship helps you make better architectural decisions.

How much hands-on experience do I need, and which labs should I prioritize?

Hands-on experience with OCI networking is valuable but not strictly required to pass the exam. Prioritize labs that cover VCN creation, security list configuration, route table setup, and hybrid connectivity using VPN or FastConnect. If possible, practice troubleshooting scenarios by intentionally misconfiguring resources and then diagnosing the issue.

What common mistakes lead to lost points on this exam?

Many candidates overlook the importance of security lists and network security groups, confusing their roles or misapplying them. Others struggle with transitive routing concepts or fail to consider failover and redundancy in design scenarios. Avoid rushing through scenario questions; read the requirements carefully and consider all constraints before selecting your answer.

What is the best strategy for the final week before the exam?

In your final week, take at least one full-length practice test under exam conditions to build pacing confidence. Review explanations for any incorrect answers and revisit weak topic areas using study notes or documentation. Avoid cramming new material; instead, reinforce what you have already learned and ensure you can apply it quickly under time pressure.

Get All 120 Questions
Question No. 1

You are designing a solution to implement IPSec encryption over a FastConnect circuit between your on-premises network and OCI. You are concerned about the overhead of IPSec impacting the maximum MTU (Maximum Transmission Unit) size that can be supported. What is the most important factor to consider when determining the MTU size for the IPSec tunnel interfaces in this scenario?

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Correct Answer: B

Concern: IPSec overhead reduces effective MTU.

MTU Impact: Must avoid fragmentation, which degrades performance.

Evaluate Factors:

A: Bandwidth doesn't dictate MTU; incorrect.

B: Smallest MTU in path (path MTU) prevents fragmentation; most critical.

C: Ethernet MTU is a factor but not the limiting one; incomplete.

D: DRG fragmentation settings are secondary to path MTU; incorrect.

Conclusion: Path MTU is the key determinant to avoid fragmentation.

IPSec reduces MTU due to headers. The Oracle Networking Professional study guide explains, 'When configuring IPSec over FastConnect, the most important factor is the smallest MTU supported along the entire path to prevent fragmentation and ensure efficient traffic flow' (OCI Networking Documentation, Section: IPSec over FastConnect). Path MTU discovery is critical.


Question No. 2

Your company is deploying a high-throughput, low-latency financial application on OCI. This application relies on raw TCP connections and requires connection persistence to maintain session state. You anticipate extremely high traffic volume and need a load balancer that can handle millions of concurrent connections with minimal overhead. You also want to use private endpoints. Which OCI load balancing option provides the most appropriate solution to meet these stringent performance and security requirements?

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Correct Answer: B

Requirements: High throughput, low latency, TCP, persistence, private endpoints.

Load Balancer Options:

ALB: Layer 7, higher overhead, HTTP-focused.

NLB: Layer 4, low overhead, TCP/UDP optimized.

Global LB: Global routing, not regional focus.

Evaluate Options:

A: ALB with IP Hash has overhead; less optimal.

B: NLB with 5-Tuple Hash offers low latency, persistence, private support; best fit.

C: Global LB with cookies is HTTP-based; incorrect.

D: HTTP focus is irrelevant for raw TCP; incorrect.

Conclusion: NLB with 5-Tuple Hash meets all criteria.

NLB is ideal for high-performance TCP. The Oracle Networking Professional study guide states, 'Network Load Balancer provides low-latency, high-throughput TCP load balancing with 5-Tuple Hash persistence, supporting private endpoints for secure, high-volume applications' (OCI Networking Documentation, Section: Network Load Balancer). This aligns with financial app needs.


Question No. 3

You are implementing IPSec over FastConnect to connect to a third-party network that is also connected to OCI via FastConnect. Your company requires a high level of security and isolation between your network and the third-party's network. Which of the following is the MOST secure approach to ensure network isolation when implementing IPSec over FastConnect in this scenario?

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Correct Answer: A

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).


Question No. 4

You are designing a hybrid cloud environment where multiple VCNs in OCI need to communicate with your on-premises network. You are using a single Dynamic Routing Gateway (DRG) to connect to your on-premises network via FastConnect. You want to ensure that each VCN is isolated from the others and that traffic between VCNs must pass through your on-premises security appliances for inspection. How should you configure the DRG attachments and route tables to enforce this security policy?

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Correct Answer: A

Requirements: VCN isolation, inter-VCN traffic via on-premises appliances.

DRG Role: Central hub for VCN and FastConnect connectivity.

Evaluate Options:

A: DRG routes inter-VCN traffic via FastConnect to on-premises; meets isolation and inspection needs.

B: Transit Routing allows direct VCN-to-VCN communication, bypassing on-premises; incorrect.

C: Bypassing DRG with VPNs is complex and unsupported; incorrect.

D: LPG is for intra-region peering, not DRG-to-FastConnect; incorrect.

Conclusion: Option A enforces the policy via DRG route tables.

DRG route tables control traffic flow. The Oracle Networking Professional study guide states, 'To force inter-VCN traffic through an on-premises network via FastConnect, configure DRG route tables to route VCN-destined traffic to the FastConnect attachment, ensuring isolation and inspection' (OCI Networking Documentation, Section: DRG Routing). This setup leverages a single DRG effectively.


Question No. 5

You are troubleshooting an issue where a compute instance in a private subnet within a VCN cannot reach OCI Object Storage. You have verified that a Service Gateway is configured for the VCN and that the route table associated with the subnet has a route rule directing traffic for OCI Services to the Service Gateway. However, the instance still cannot connect. What is the MOST likely cause of the problem?

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Correct Answer: B

Problem: Instance in private subnet can't reach Object Storage despite Service Gateway and routing.

Option A: Service Gateway enables private access; public IP isn't required---incorrect.

Option B: Security lists/NSGs act as firewalls; if outbound traffic to Object Storage CIDR isn't allowed, connectivity fails---most likely and correct.

Option C: Service Gateway defaults to all OCI services unless restricted; less likely given setup verification---incorrect.

Option D: Oracle Cloud Agent is for management, not connectivity---incorrect.

Conclusion: Option B is the most probable cause.

Oracle states:

'For private access to Object Storage via a Service Gateway, ensure security lists or NSGs allow outbound traffic to the Object Storage CIDR block.'

This supports Option B. Reference: Service Gateway Troubleshooting - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/servicegateway.htm#troubleshooting).


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