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1z0-1124-25 Question Explanations & 1z0-1124-25 Study Test

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Oracle 1z0-1124-25 Exam Syllabus Topics:

Topic
Details

Topic 1

Migrate Workloads to OCI: This section of the exam measures the skills of a Cloud Migration Specialist and focuses on identifying the best networking connectivity strategies when migrating workloads to Oracle Cloud. It includes scenarios involving on-premises infrastructure, other cloud providers, and multicloud environments, ensuring proper connectivity and minimal downtime during transitions.

Topic 2

Transitive Routing: This section of the exam measures the skills of a Network Security Engineer and focuses on the interpretation and synthesis of transitive routing configurations. It includes understanding how DRG, Local Peering Gateways (LPG), and network appliances interact in a routed network and implementing those configurations effectively.

Topic 3

Design for Hybrid Networking Architectures: This section of the exam measures the skills of a Network Infrastructure Architect and assesses capabilities in designing hybrid networking environments. It involves demonstrating proficiency with Dynamic Routing Gateway (DRG) configurations, attachments, BGP routing protocols, VPN services, and evaluating FastConnect offerings. This section also emphasizes maintaining reliable multicloud connectivity and implementing IPSec over FastConnect, along with transitive routing practices.

Topic 4

Implement and Operate Secure OCI Networking and Connectivity Solutions: This section of the exam measures the skills of a Cloud Security Specialist and centers around securing networking configurations and interconnectivity in OCI. It involves applying IAM policies for tenancy communication, using bastion services in multi-tier setups, exploring CloudShell capabilities, and evaluating network security layers like OCI Network Firewall, Web Application Firewall (WAF), edge services, and certificates. This section also references obsolete content related to IaC and OKE in networking architectures while touching on zero-trust packet routing models.

Topic 5

Design and Deploy OCI Virtual Cloud Networks (VCN): This section of the exam measures the skills of a Cloud Network Engineer and covers the design and configuration of Virtual Cloud Networks in Oracle Cloud Infrastructure. It includes understanding VCN and subnet characteristics, implementing both IPv4 and IPv6 addressing, identifying the distinct roles of OCI gateways, and recognizing endpoint types and their application within networking architectures. Knowledge of Object Storage endpoints is also referenced.

>> 1z0-1124-25 Question Explanations <<

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Oracle Cloud Infrastructure 2025 Networking Professional Sample Questions (Q80-Q85):

NEW QUESTION # 80
As a network security engineer, you are tasked with designing a highly secure architecture for a financial application running on OCI. You have deployed a Network Firewall to protect the application's VCN. Due to regulatory compliance requirements, you need to ensure that no direct internet access is allowed to any compute instance within the application's private subnet, even if it is misconfigured. You need to block all outbound traffic to the internet. Which Network Firewall rule action best accomplishes this goal?

A. ALLOW with Destination IP address set to the Service Gateway IP address.
B. DROP with Destination IP address set to the NAT Gateway IP address.
C. REJECT with Destination IP address set to 0.0.0.0/0.
D. ALLOW with Destination IP address set to 0.0.0.0/0.

Answer: C

Explanation:
* Objective: Block all outbound internet traffic from a private subnet, ensuring compliance despite misconfigurations.
* Option A: ALLOW to 0.0.0.0/0 permits all traffic, contradicting the requirement.
* Option B: DROP to NAT Gateway IP only blocks traffic to the NAT Gateway, not all internet traffic (e.
g., misconfigured routes bypassing NAT).
* Option C: REJECT to 0.0.0.0/0 blocks all outbound traffic to any IP, sending an ICMP unreachable message. This ensures no internet access, even if misconfigured, and aids troubleshooting.
* Option D: ALLOW to Service Gateway permits OCI service access, not internet blocking.
* Conclusion: Option C is the most comprehensive and compliant solution.
Oracle's Network Firewall guide states:
* "Use REJECT with a destination of 0.0.0.0/0 to block all outbound traffic and notify the source, ideal for strict egress control."This matches Option C's purpose. Reference:Network Firewall Policies - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/NetworkFirewall/Tasks/managingpolicies.htm).

NEW QUESTION # 81
You are designing a hybrid cloud architecture connecting your on-premises network to OCI. You have established a Site-to-Site VPN between your on-premises network and an OCI DRG. You have two VCNs attached to the DRG: VCN-A (10.0.0.0/16) and VCN-B (10.1.0.0/16). You need to ensure that only VCN-A can communicate with the on-premises network (192.168.1.0/24), while VCN-B should remain isolated. What is the MOST effective and secure method to achieve this connectivity requirement using DRG route tables?

A. Create a single DRG route table. Add a route rule to the DRG route table for 192.168.1.0/24 pointing to the VPN attachment. Associate this route table with both the VCN-A and VCN-B attachments.
Implement Network Security Groups (NSGs) on VCN-B to block all traffic to and from 192.168.1.0/24.
B. Create two DRG route tables: DRG-RT-A and DRG-RT-B. In DRG-RT-A, add a route rule for
192.168.1.0/24 pointing to the VPN attachment. Associate DRG-RT-A with the VCN-A attachment. In DRG-RT-B, add a route rule for 192.168.1.0/24 pointing to the VPN attachment and associate DRG- RT-B with the VCN-B attachment. Then, use security lists to block all traffic between VCN-B and the on-premises network.
C. Create a single DRG route table. Add a route rule to the DRG route table for 192.168.1.0/24 pointing to the VPN attachment. Associate this route table with the VCN-A attachment. Associate a default DRG route table that contains no routes for the VPN attachment with the VCN-Battachment.
D. Create two DRG route tables: DRG-RT-A and DRG-RT-B. In DRG-RT-A, add a route rule for
192.168.1.0/24 pointing to the VPN attachment. Associate DRG-RT-A with the VCN-A attachment.
Associate DRG-RT-B (containing no routes for 192.168.1.0/24) with the VCN-B attachment.

Answer: D

Explanation:
* Objective: Allow VCN-A to access on-premises (192.168.1.0/24) via VPN, isolate VCN-B using DRG route tables effectively and securely.
* Option A: Single route table for both VCNs with NSGs on VCN-B to block traffic. This works but relies on NSGs, which are secondary to routing. Routing-level isolation is more secure and efficient.
* Option B: Single route table for VCN-A with the VPN route, default table (no VPN route) for VCN-B.
This isolates VCN-B effectively at the routing level, but managing one table across all attachments can complicate scaling.
* Option C: Two route tables, both with VPN routes, then blocking VCN-B with security lists. This is inefficient-routes are advertised unnecessarily, relying on security lists instead of routing isolation.
* Option D: Two route tables-DRG-RT-A with VPN route for VCN-A, DRG-RT-B with no VPN route for VCN-B. This ensures VCN-B has no path to on-premises at the DRG level, providing the strongest isolation.
* Conclusion: Option D is the most effective and secure, leveraging routing for isolation rather than secondary security controls.
Oracle documentation states:
* "DRG route tables control traffic between VCN attachments and external connections (e.g., VPN).
Associate a unique route table with each attachment to enforce specific routing policies."
* "To isolate a VCN, ensure its DRG route table contains no routes to the destination."Option D aligns with this approach. Reference:Dynamic Routing Gateway Overview - Oracle Help Center(docs.oracle.
com/en-us/iaas/Content/Network/Tasks/managingDRGs.htm).

NEW QUESTION # 82
When using Service Connector Hub to route VCN Flow Logs to Object Storage for long-term analysis, which Service Connector Hub task type is essential for ensuring the logs are correctly processed and stored?

A. Ingest Logs
B. Deliver Logs
C. Transform Logs
D. Process Logs

Answer: B

Explanation:
* Objective: Identify the essential Service Connector Hub task for routing Flow Logs to Object Storage.
* Option A (Ingest Logs): Ingesting is for bringing external logs into OCI, but Flow Logs are already OCI-native-incorrect.
* Option B (Process Logs): "Process Logs" isn't a specific task type in Service Connector Hub- incorrect.
* Option C (Deliver Logs): Deliver Logs moves logs to a target (e.g., Object Storage), ensuring storage-correct and essential.
* Option D (Transform Logs): Transforming modifies logs optionally, but delivery is required for storage-incorrect as the primary task.
* Conclusion: Deliver Logs is the essential task type for this scenario.
Oracle documentation states:
* "The Deliver Logs task in Service Connector Hub moves logs, such as VCN Flow Logs, to a specified destination like Object Storage for storage and analysis."This supports Option C. Reference:Service Connector Hub Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content
/ServiceConnectorHub/Concepts/serviceconnectorhub.htm).

NEW QUESTION # 83
You have configured an IPSec VPN tunnel over your FastConnect circuit to OCI. You are experiencing intermittent connectivity issues and notice that the VPN tunnel is flapping (frequently going up and down).
You have verified the IKE and IPSec configuration and confirmed that the security policies are correct.
Which is a LESS likely cause of the VPN tunnel flapping when using IPSec over FastConnect, compared to using IPSec over the public internet?

A. MTU (Maximum Transmission Unit) misconfiguration leading to fragmentation.
B. Mismatched pre-shared keys or incorrect IKE/IPSec parameters.
C. Issues with network congestion or packet loss.
D. BGP route flapping or instability.

Answer: C

Explanation:
* Context: Tunnel flapping over FastConnect vs. public internet.
* Option A: Congestion/packet loss is less likely over FastConnect's dedicated link than the unpredictable public internet-correct.
* Option B: Mismatched keys/parameters would prevent tunnel establishment, not flapping-equally likely in both.
* Option C: MTU issues cause fragmentation in both scenarios-equally likely.
* Option D: BGP flapping is more relevant with FastConnect's dynamic routing-more likely here.
* Conclusion: Option A is less likely over FastConnect.
Oracle notes:
* "FastConnect provides a stable, dedicated connection, reducing congestion and packet loss compared to public internet VPNs."This supports Option A. Reference:IPSec over FastConnect - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm#fastconnect).

NEW QUESTION # 84
When applying Zero Trust principles to packet routing within OCI, what is the significance of using private endpoints instead of Service Gateways for accessing OCI services?

A. Private endpoints restrict access to specific instances of a service, enhancing security.
B. Private endpoints eliminate the need for IAM policies.
C. Private endpoints are only used for internet access.
D. Private endpoints automatically open all ports for service access.

Answer: A

Explanation:
* Context: Zero Trust requires strict access control.
* Option A: IAM policies are still required-incorrect.
* Option B: Private endpoints limit access to specific service instances, aligning with Zero Trust- correct.
* Option C: Ports are controlled by NSGs/security lists-incorrect.
* Option D: Private endpoints are for private access, not internet-incorrect.
* Conclusion: Option B enhances security.
Oracle states:
* "Private endpoints restrict access to specific OCI service instances, enhancing Zero Trust by limiting exposure compared to Service Gateways."This supports Option B. Reference:Private Endpoints - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/privateendpoints.htm).

NEW QUESTION # 85
......

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