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Oracle Cloud Infrastructure 2025 Networking Professional Sample Questions (Q91-Q96):

NEW QUESTION # 91
Your company has established a hybrid cloud environment using FastConnect to connect your on-premises network to your OCI VCN. You are advertising on-premises network prefixes to OCI via BGP. You want to ensure that OCI only learns routes from your on-premises network that are within a specific range, and that any other prefixes advertised are rejected to prevent routing conflicts. Which BGP attribute and configuration on the OCI side should you use to achieve this?

  • A. Route Filtering using Prefix Lists: Configure Prefix Lists on the FastConnect virtual circuit to accept only the desired prefix ranges and reject all others.
  • B. MED (Multi-Exit Discriminator): Configure MED values on the on-premises BGP router toinfluence OCI's route selection based on preferred exit points.
  • C. AS Path Prepending: Configure AS Path Prepending on the FastConnect virtual circuit to discourage OCI from selecting routes outside the desired range.
  • D. Route Filtering using Route Distinguisher (RD) and Route Target (RT): Configure RDs and RTs on the FastConnect virtual circuit to filter routes based on tenant isolation.

Answer: A

Explanation:
* Objective:Filter BGP routes on OCI to accept only specific on-premises prefixes.
* BGP Attributes Overview:
* AS Path Prepending:Lengthens AS path to influence route preference, not filtering.
* MED:Influences exit point selection, not route acceptance.
* RD/RT:Used in MPLS VPNs for tenant isolation, not simple prefix filtering.
* Prefix Lists:Directly filter prefixes based on IP ranges.
* Evaluate Options:
* A:AS Path Prepending affects preference, not filtering; unsuitable.
* B:MED influences path selection, not route rejection; incorrect.
* C:RD/RT is for VPN contexts, not applicable here.
* D:Prefix Lists explicitly allow/deny prefixes, meeting the requirement.
* Conclusion:Prefix Lists on the FastConnect virtual circuit provide precise control over accepted routes.
Prefix Lists are the most effective BGP tool for filtering routes in OCI. The Oracle Networking Professional study guide notes, "Prefix Lists can be applied to FastConnect virtual circuits to filter BGP advertisements, ensuring only approved prefixes are learned by OCI" (OCI Networking Documentation, Section: FastConnect and BGP). This prevents routing conflicts by rejecting unwanted prefixes, aligning with the security and control requirements.


NEW QUESTION # 92
You are responsible for maintaining the network connectivity between OCI and Azure using the OCI-Azure Interconnect. You need to perform planned maintenance on your on-premises network, which will temporarily disrupt the BGP (Border Gateway Protocol) sessions between your on-premises network and both OCI and Azure. You want to ensure that traffic between OCI and Azure continues to flow without interruption during the maintenance window. Which action is MOST important to take before starting the maintenance to ensure continuous connectivity between OCI and Azure?

  • A. Increase the BGP keepalive timers on both OCI and Azure to prevent the sessions from timing out.
  • B. Notify Oracle and Microsoft support teams about the planned maintenance window.
  • C. Disable the BGP sessions on both OCI and Azure before starting the maintenance.
  • D. Configure static routes in OCI and Azure to directly route traffic between the VCNs/VNets without relying on BGP.

Answer: D

Explanation:
* Goal: Ensure OCI-Azure traffic during BGP disruption.
* Option A: Static routes bypass BGP dependency, maintaining connectivity-correct.
* Option B: Disabling BGP stops routing-incorrect.
* Option C: Notification doesn't ensure connectivity-incorrect.
* Option D: Keepalive timers delay detection, not prevent disruption-incorrect.
* Conclusion: Option A is most critical.
Oracle notes:
* "For uninterrupted OCI-Azure Interconnect traffic during BGP maintenance, configure static routes between VCNs and VNets."This supports Option A. Reference:OCI-Azure Interconnect - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/ociazureinterconnect.htm).


NEW QUESTION # 93
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. BGP route flapping or instability.
  • B. Issues with network congestion or packet loss.
  • C. Mismatched pre-shared keys or incorrect IKE/IPSec parameters.
  • D. MTU (Maximum Transmission Unit) misconfiguration leading to fragmentation.

Answer: B

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 # 94
When troubleshooting inter-region connectivity issues between VCNs peered via a Dynamic Routing Gateway (DRG), which OCI tool is most effective for verifying the routing configuration and identifying potential misconfigurations?

  • A. OCI Audit Logs
  • B. Network Visualizer
  • C. Oracle Cloud Guard
  • D. DRG Route Tables

Answer: D

Explanation:
* Goal: Verify routing for inter-region VCN peering via DRG.
* Option A: Cloud Guard monitors security, not routing-incorrect.
* Option B: Audit Logs track changes, not current routing state-incorrect.
* Option C: DRG Route Tables define routing rules, directly showing misconfigurations-correct.
* Option D: Network Visualizer shows topology but not detailed routing rules-less effective.
* Conclusion: DRG Route Tables are most effective.
Oracle states:
* "DRG Route Tables are the primary tool for verifying and troubleshooting routing configurations for inter-region VCN peering."This validates Option C. Reference:DRG Troubleshooting - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingDRGs.htm#troubleshooting).


NEW QUESTION # 95
You are designing a multicloud architecture where your customer wants to leverage OCI for its cost-effective compute and storage, while utilizing Microsoft Azure's AI/ML services and AWS's extensive serverless capabilities. The application requires low latency and high bandwidth between the clouds. Which of the following approaches provides the LEAST optimal solution for interconnecting these three cloud providers for production workloads?

  • A. Establishing a dedicated, low-latency connection between each cloud provider's nearest peering location using a third-party network provider for maximum bandwidth and minimizing network hops
  • B. Creating IPSec VPN tunnels between OCI, Azure, and AWS, utilizing the native VPN gateways offered by each respective cloud provider for secure, encrypted communication
  • C. Utilizing OCI FastConnect to establish private peering with Azure and AWS through supported FastConnect partners to ensure dedicated bandwidth and consistent performance
  • D. Connecting OCI to Azure via OCI Azure Interconnect, then establishing an IPSec VPN tunnel from Azure to AWS using Azure's VPN Gateway

Answer: B

Explanation:
* Requirements: Low latency, high bandwidth for multicloud production.
* Option A: Dedicated peering via third-party provider offers high performance-optimal.
* Option B: IPSec VPNs over public internet have variable latency and limited bandwidth-least optimal.
* Option C: FastConnect peering with partners ensures dedicated performance-optimal.
* Option D: OCI-Azure Interconnect is fast, but VPN to AWS adds latency-less optimal than A or C but better than B.
* Conclusion: Option B is the least optimal due to performance constraints.
Oracle notes:
* "IPSec VPNs over public internet provide security but lack the bandwidth and latency consistency of dedicated connections like FastConnect for production workloads."This supports Option B as least optimal. Reference:Multicloud Connectivity Options - Oracle Help Center(docs.oracle.com/en-us/iaas
/Content/Network/Concepts/multicloud.htm#options).


NEW QUESTION # 96
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