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Oracle Cloud Infrastructure 2025 Networking Professional Sample Questions (Q105-Q110):

NEW QUESTION # 105
You are tasked with migrating a critical, latency-sensitive application from Azure to OCI. Due to compliance requirements, all data must be encrypted in transit. Which connectivity option provides the BEST combination of security and performance for this migration?

  • A. Employ Azure VPN Gateway in conjunction with an OCI Load Balancer with SSL termination for the incoming connections from Azure
  • B. Leverage Azure Data Factory to transfer data to OCI Object Storage via HTTPS
  • C. Configure a Site-to-Site VPN between Azure's Virtual Network Gateway and OCI's Dynamic Routing Gateway (DRG), relying on the built-in IPSec encryption
  • D. Utilize Azure ExpressRoute and OCI FastConnect through a colocation provider, then implement application-level encryption using TLS

Answer: D

Explanation:
* Requirements: Low latency, high security with encryption for migration.
* Option A: VPN with IPSec offers encryption but has higher latency over public internet-less optimal.
* Option B: ExpressRoute and FastConnect provide a private, low-latency link; TLS adds end-to-end encryption-correct and best combination.
* Option C: Data Factory with HTTPS is encrypted but slow and not real-time-incorrect.
* Option D: VPN with Load Balancer SSL termination breaks end-to-end encryption-incorrect.
* Conclusion: Option B balances performance and security.
Oracle notes:
* "For latency-sensitive migrations, use FastConnect with ExpressRoute via colocation, enhanced by TLS for secure, high-performance data transfer."This supports Option B. Reference:Multicloud Connectivity
- Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/multicloud.htm).


NEW QUESTION # 106
You are configuring a VCN with multiple subnets for a customer. The security team requires that all instances have IPv6 addresses. You configure the VCN with an IPv6 ULA CIDR block of fc00:1:1::/48 and create two private subnets. After launching instances in the two private subnets, you notice that they only have IPv4 addresses assigned. You have not manually configured any IPv6 addresses on the instances themselves. What steps are necessary to ensure the instances automatically receive IPv6 addresses?

  • A. Ensure that SLAAC (Stateless Address Autoconfiguration) is enabled on the operating system of the instances within the two subnets.
  • B. Make sure the "Assign public IPv4 address" option is not selected during instance creation. This will force the instance to default to IPv6 allocation.
  • C. No further steps are needed. Instances will automatically receive IPv6 addresses within the configured subnets upon launch.
  • D. IPv6 address assignment is only supported on instances launched in public subnets.

Answer: A

Explanation:
* Problem:Instances lack IPv6 addresses despite VCN IPv6 configuration.
* OCI IPv6 Behavior:IPv6 requires subnet enablement and OS support via SLAAC.
* Evaluate Options:
* A:Incorrect. OCI doesn't auto-assign IPv6 without OS configuration.
* B:Correct. SLAAC must be enabled on the instance OS for auto-assignment.
* C:Incorrect. IPv6 works in both public and private subnets.
* D:Incorrect. IPv4 and IPv6 assignments are independent.
* Conclusion:Enabling SLAAC on the OS ensures automatic IPv6 assignment.
IPv6 in OCI relies on SLAAC for automatic address assignment. The Oracle Networking Professional study guide states, "To enable IPv6 on instances, the VCN and subnet must have IPv6 CIDR blocks, and the instance OS must support SLAAC to automatically configure IPv6 addresses" (OCI Networking Documentation, Section: IPv6 Configuration). Without SLAAC, instances default to IPv4 only.


NEW QUESTION # 107
You are designing a multi-tier application in OCI, deploying the application tier in a public subnet and the database tier in a private subnet within the same VCN. The application tier requires access to specific external internet resources for software updates and third-party API calls. However, the database tier should not have direct internet access. Which of the following is the most secure and efficient method to achieve this configuration?

  • A. Configure a NAT Gateway for the private subnet and an Internet Gateway for the public subnet.
  • B. Configure a NAT Gateway for the private subnet and a Service Gateway for the public subnet.
  • C. Configure a NAT Gateway for the public subnet and a Service Gateway for the private subnet.
  • D. Configure a NAT Gateway for both the public and private subnets.

Answer: A

Explanation:
* Requirements:App tier (public) needs internet; DB tier (private) must not.
* Components:
* Internet Gateway:Full internet access for public subnets.
* NAT Gateway:Outbound-only internet for private subnets.
* Service Gateway:Private OCI service access.
* Evaluate Options:
* A:Reversed roles; public subnet doesn't need Service Gateway; incorrect.
* B:NAT for public is unnecessary with Internet Gateway; inefficient.
* C:NAT for public is wrong; Service Gateway doesn't block DB internet; incorrect.
* D:Internet Gateway for app, NAT for DB if needed, aligns with policy; correct.
* Conclusion:Option D is most secure and efficient.
Subnet roles dictate gateway use. The Oracle Networking Professional study guide states, "Public subnets use an Internet Gateway for full internet access, while private subnets can use a NAT Gateway for outbound-only access, ensuring no direct internet exposure" (OCI Networking Documentation, Section: VCN Gateways).
Option D balances security and functionality.


NEW QUESTION # 108
You are designing a highly available application that requires low latency communication between OCI regions. You have two VCNs, VCN-A in Region 1 and VCN-B in Region 2. These VCNs have non- overlapping CIDR blocks and you want to establish a private, direct connection between them for optimal performance. Which of the following steps are necessary to establish this cross-region connectivity using the native OCI networking capabilities?

  • A. Create a Remote Peering Connection (RPC) in each VCN, establish the peering, and update the route tables in each VCN to route traffic to the peer VCN's CIDR block through the RPC.
  • B. Configure an IPSec VPN tunnel between the VCNs and update the route tables in each VCN to route traffic to the peer VCN's CIDR block through the IPSec VPN tunnel.
  • C. Create a Service Gateway in each VCN, and configure a Dynamic Routing Gateway (DRG) toroute traffic between the Service Gateways.
  • D. Create a NAT Gateway in each VCN and configure route rules to route traffic to the other NAT Gateway's public IP address.

Answer: A

Explanation:
* Requirements: Private, low-latency cross-region VCN connectivity.
* Option A: RPCs with route table updates enable private, direct peering via DRG-correct.
* Option B: IPSec VPN adds latency over internet-incorrect.
* Option C: Service Gateways are for OCI services-incorrect.
* Option D: NAT Gateways use public IPs, not private-incorrect.
* Conclusion: Option A is necessary.
Oracle states:
* "Use Remote Peering Connections (RPCs) with DRG to connect VCNs across regions privately.
Update route tables for CIDR routing."This supports Option A. Reference:Remote VCN Peering - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/remoteVCNpeering.htm).


NEW QUESTION # 109
Your company has a FastConnect circuit established between your on-premises data center and OCI.
However, you have a specific regulatory requirement to encrypt all traffic, even over dedicated connections like FastConnect. You need to implement IPSec encryption without significantly impacting the available bandwidth of your FastConnect circuit. Which is the most effective approach to implement IPSec encryption over your existing FastConnect circuit, while maintaining high bandwidth?

  • A. Establish a second, separate Site-to-Site VPN connection to OCI over the public internet, and route all sensitive traffic over this VPN, while routing non-sensitive traffic over the FastConnect circuit.
  • B. Deploy virtual firewall appliances within OCI and your on-premises network and configure IPSec tunnels between them, routing all traffic through the firewalls. Use a high-security encryption algorithm like AES-256.
  • C. Configure a Site-to-Site VPN using the OCI Dynamic Routing Gateway (DRG) over theFastConnect virtual circuit. Use a low-overhead encryption algorithm like AES-GCM.
  • D. Terminate IPSec VPN on compute instances in a public subnet on the OCI side.

Answer: C

Explanation:
* Requirements:Encrypt FastConnect traffic with minimal bandwidth impact.
* IPSec Options:
* DRG VPN:Native OCI solution over FastConnect.
* Firewall Appliances:Adds overhead and complexity.
* Compute Instances:Resource-intensive, not scalable.
* Internet VPN:Uses public internet, against requirements.
* Evaluate Options:
* A:DRG VPN with AES-GCM (low-overhead encryption) leverages FastConnect; optimal.
* B:Firewalls with AES-256 add overhead, reducing bandwidth; less effective.
* C:Compute-based VPN is inefficient and public-facing; unsuitable.
* D:Public internet VPN violates privacy requirement; incorrect.
* Conclusion:DRG VPN with AES-GCM is the most effective solution.
OCI supports IPSec over FastConnect via DRG. The Oracle Networking Professional study guide explains,
"A Site-to-Site VPN over FastConnect using the DRG provides encrypted traffic with low-overhead algorithms like AES-GCM, maintaining high bandwidth" (OCI Networking Documentation, Section:
FastConnect with VPN). This meets regulatory and performance needs efficiently.


NEW QUESTION # 110
......

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