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Oracle 1z0-1124-25 認定試験の出題範囲：
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質問 # 63
When establishing cross-tenancy connectivity using Remote Peering Connections (RPCs), which IAM policy statement is essential to grant the requesting tenancy the ability to initiate the connection?
- A. Allow group <group_name> to read remote-peering-connections in tenancy=<target_tenancy_OCID>
- B. Allow group <group_name> to use remote-peering-connections in tenancy=<target_tenancy_OCID>
- C. Allow group <group_name> to inspect virtual-network-family in tenancy=<target_tenancy_OCID>
- D. Allow group <group_name> to manage virtual-network-family in tenancy=<target_tenancy_OCID>
正解：B
解説：
* Objective:Grant requesting tenancy permission to initiate an RPC to the target tenancy.
* RPC Process:Requires the requesting tenancy to create and connect the RPC, which needs specific IAM permissions in the target tenancy.
* IAM Verbs:
* manage:Broad permissions, too permissive for RPC initiation.
* use:Allows creation and connection of RPCs, precise for this task.
* inspect:Read-only, insufficient for initiating connections.
* read:Read-only, insufficient for initiating connections.
* Evaluate Options:
* A:Too broad, includes unnecessary permissions; incorrect.
* B:Precise permission for RPC initiation; correct.
* C:Read-only, doesn't allow connection; incorrect.
* D:Read-only, doesn't allow connection; incorrect.
* Conclusion:"use remote-peering-connections" is the essential policy.
RPCs require specific IAM policies for cross-tenancy connectivity. The Oracle Networking Professional study guide states, "To initiate a Remote Peering Connection, the requesting tenancy needs an IAM policy with the 'use remote-peering-connections' verb targeting the acceptor tenancy's OCID" (OCI Networking Documentation, Section: Remote Peering Connections). This ensures controlled access for connection establishment.
質問 # 64
A large financial institution is migrating its on-premises trading platform to OCI. The platform requires low latency and high bandwidth connectivity to the on-premises data center. You have established an Oracle Cloud Infrastructure FastConnect circuit. You now need to connect multiple VCNs in different regions to the on-premises data center via this FastConnect circuit, optimizing for cost and management overhead. Which DRG configuration would be the most efficient and recommended approach?
- A. Create a separate DRG in each region and attach each VCN to its regional DRG. Then, create a separate FastConnect attachment to each regional DRG. Finally, configure static routes on each DRG to direct traffic appropriately.
- B. Create a single DRG in one region and attach all VCNs in all regions to this single DRG using remote peering connections. Attach the FastConnect circuit to this single DRG. Configure static routes on the DRG to direct traffic to the appropriate VCNs.
- C. Create a single DRG in one region. Attach all VCNs in all regions to this single DRG using DRG attachments with remote peering. Attach the FastConnect circuit to the single DRG.
- D. Create a single DRG in one region and attach all VCNs in all regions to this single DRG using local peering gateways (LPGs). Attach the FastConnect circuit to this single DRG. Configure static routes on the DRG to direct traffic to the appropriate VCNs.
正解：C
解説：
* Requirements:Low latency, high bandwidth, multi-region VCNs via one FastConnect, minimal cost
/overhead.
* DRG Strategy:
* Multiple DRGs:Increases cost and complexity.
* Single DRG:Centralizes management, reduces FastConnect attachments.
* Evaluate Options:
* A:Multiple DRGs and FastConnects; costly and complex; incorrect.
* B:Remote peering connections imply RPC, not standard DRG attachments; less precise.
* C:Single DRG with remote peering attachments; efficient and correct terminology; optimal.
* D:LPGs are intra-region, not cross-region; incorrect.
* Conclusion:Single DRG with remote peering attachments is most efficient.
A single DRG optimizes multi-region setups. The Oracle Networking Professional study guide notes, "For connecting multiple VCNs across regions to a single FastConnect, use one DRG with remote peering attachments to minimize cost and management overhead" (OCI Networking Documentation, Section: DRG with FastConnect). Option C aligns with OCI's recommended architecture.
質問 # 65
You are designing a multi-tier application within an OCI Virtual Cloud Network (VCN). The application comprises a public-facing web tier in one subnet, an application tier in another, and a database tier in a third.
For security reasons, you want to ensure that only the application tier can initiate connections to the database tier. The web tier needs to be able to communicate with the application tier, but not directly with the database tier. You are using private IP addresses within your VCN. Which procedural step is MOST effective to achieve this network isolation?
- A. Create separate security lists for each subnet and configure ingress and egress rules to restrict traffic accordingly. Configure the route table for the Web Tier subnet to route traffic destined for the Database Tier subnet through the Application Tier.
- B. Create separate Network Security Groups (NSGs) for each tier and configure ingress and egress rules to restrict traffic accordingly. Configure the route table for the Web Tier subnet to route traffic destined for the Database Tier subnet through the Application Tier.
- C. Create separate security lists for each subnet and configure ingress and egress rules to restrict traffic accordingly. Create appropriate route rules in each subnet's route table.
- D. Create a single Network Security Group (NSG) and associate it with all three subnets. Configure ingress and egress rules within the single NSG to restrict traffic accordingly.
正解：C
解説：
* Requirements: App tier only initiates to DB; web tier to app tier only.
* Option A: NSGs with forced routing through app tier adds complexity and latency-less effective.
* Option B: Single NSG lacks subnet-level isolation-incorrect.
* Option C: Separate security lists per subnet with ingress/egress rules enforce isolation; route tables ensure proper VCN routing-correct and effective.
* Option D: Security lists are good, but routing web-to-DB via app tier is unnecessary-incorrect.
* Conclusion: Option C achieves isolation efficiently.
Oracle states:
* "Use separate security lists per subnet with ingress/egress rules to isolate tiers. Route tables manage intra-VCN traffic without forced hops."This supports Option C. Reference:Security Lists Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Concepts/securitylists.htm).
質問 # 66
You're automating the creation of multiple VCNs across different OCI regions using Cloud Shell scripting.
Which authentication method within Cloud Shell is best suited to programmatically authenticate with OCI, ensuring both security and scalability for this automation task?
- A. Leverage Instance Principals in conjunction with a dynamic group that includes your Cloud Shell session.
- B. Using the default Cloud Shell user and configuring the OCI CLI with API keys in a shell script.
- C. Using Resource Manager stack with Terraform to provision network resources including cross-region configurations, leveraging OCI Vault to handle the sensitive credentials used in Terraform scripts.
- D. Creating a dedicated IAM user for automation, generating API keys, storing the keys securely in Cloud Shell's persistent storage, and using them in the scripts.
正解：A
解説：
* Requirements:Secure, scalable authentication for Cloud Shell scripting.
* Methods:
* API Keys:Manual, less secure if stored.
* Instance Principals:Credential-less, dynamic.
* Terraform with Vault:Secure but complex for scripting.
* Evaluate Options:
* A:API keys in script are insecure; not scalable.
* B:Persistent storage risks exposure; less secure.
* C:Instance Principals use IAM, no credentials; best fit.
* D:Overkill for simple scripting, better for IaC; less suited.
* Conclusion:Instance Principals offer security and scalability.
Instance Principals simplify automation. The Oracle Networking Professional study guide states,"Instance Principals allow Cloud Shell to authenticate via dynamic groups without storing credentials, ideal for secure, scalable scripting" (OCI Networking Documentation, Section: Authentication in Cloud Shell). This avoids key management issues.
質問 # 67
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 themaximum 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?
- A. The MTU size of the underlying Ethernet frames used by the FastConnect circuit.
- B. The available bandwidth of the FastConnect circuit. A larger MTU requires a higher bandwidth connection.
- C. The smallest MTU supported by any device along the entire network path between your on-premises network and OCI, including the FastConnect provider's network.
- D. The fragmentation settings on the DRG in OCI.
正解：C
解説：
* 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.
質問 # 68
You are designing a highly available web application in OCI. You've created a VCN with two public subnets across different Availability Domains (ADs). You need to enable IPv6 support for the application to cater to a growing number of IPv6-only clients. You plan to use a Load Balancer to distribute traffic to backend compute instances in the public subnets. Which of the following approaches ensures the highest level of resilience and IPv6 connectivity for your application?
- A. Configure the VCN with a public IPv6 CIDR block obtained from Oracle. Configure the Load Balancer to listen on both IPv4 and IPv6 addresses. Ensure the backend compute instances also listen on both IPv4 and IPv6 addresses.
- B. Configure the VCN with a /48 IPv6 ULA prefix. Configure the Load Balancer to listen on IPv4 only, and the compute instances to listen on both IPv4 and IPv6, relying on NAT for IPv6 clients.
- C. Configure the VCN with a /48 IPv6 ULA prefix. Configure the Load Balancer to listen on both IPv4 and IPv6 addresses. Ensure the backend compute instances also listen on both IPv4 and IPv6 addresses.
Route traffic accordingly using NSGs. - D. Configure the VCN with a public IPv6 CIDR block obtained from Oracle. Configure the Load Balancer to listen on IPv4 only, while backend compute instances listen on both IPv4 and IPv6, relying on NAT for IPv6 clients.
正解：A
解説：
* Requirements: HA and IPv6 support for public web app.
* Option A: ULA is private, not routable; NAT for IPv6 is inefficient-incorrect.
* Option B: ULA doesn't support public IPv6 clients-incorrect.
* Option C: Public IPv6 CIDR is correct, but IPv4-only LB with NAT lacks direct IPv6-less resilient.
* Option D: Public IPv6 CIDR with dual-stack LB and instances ensures full IPv6 support and HA across ADs-correct.
* Conclusion: Option D maximizes resilience and connectivity.
Oracle states:
* "For public IPv6 applications, use a public IPv6 CIDR block and configure Load Balancers and instances for both IPv4 and IPv6 to ensure resilience."This supports Option D. Reference:IPv6 in OCI - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/managingIPv6.htm).
質問 # 69
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. DRG Route Tables
- B. Network Visualizer
- C. OCI Audit Logs
- D. Oracle Cloud Guard
正解：A
解説：
* 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).
質問 # 70
You are setting up a FastConnect connection between your on-premises data center and OCI. You need to configure BGP to exchange routing information. You require OCI to always prefer the FastConnect path for traffic destined to your on-premises network, even if OCI learns about the same prefixes via the public internet. Which BGP attribute should you configure on the OCI side of the FastConnect connection to achieve this?
- A. Increase the Local Preference for routes learned via FastConnect.
- B. Advertise a more specific (longer prefix length) route via FastConnect.
- C. Configure MED to a lower value for routes advertised via FastConnect.
- D. Decrease the AS Path length for routes learned via FastConnect.
正解：A
解説：
* Goal:Prefer FastConnect routes over public internet in OCI.
* BGP Attributes:
* Local Preference:Higher value prefers a path within an AS.
* AS Path:Shorter path preferred, but manipulated on sender side.
* Prefix Length:More specific wins, but not controllable here.
* MED:Influences inbound traffic, not OCI preference.
* Evaluate Options:
* A:Higher Local Preference ensures FastConnect priority; correct.
* B:AS Path is set by on-premises, not OCI; incorrect.
* C:Prefix specificity is on-premises controlled; incorrect.
* D:MED affects on-premises, not OCI; incorrect.
* Conclusion:Local Preference is the right attribute.
Local Preference controls route preference in BGP. The Oracle Networking Professional study guide states,
"To prioritize FastConnect routes in OCI, increase the Local Preference for routes learned via the FastConnect virtual circuit over other paths" (OCI Networking Documentation, Section: BGP Configuration). This ensures OCI prefers the private path.
質問 # 71
You are designing a microservices-based application on OCI. Each microservice is deployed as a container in Oracle Container Engine for Kubernetes (OKE). You want to expose these microservices through a single entry point using a Layer 7 load balancer and route traffic based on the request path. Which OCI load balancing integration method with OKE is the MOST appropriate and efficient?
- A. Manually create a Regional Load Balancer and configure backend sets with the private IP addresses of the Kubernetes worker nodes hosting the microservices.
- B. Deploy a Kubernetes Ingress controller that leverages an OCI Regional Load Balancer to route traffic to the microservice pods based on Ingress rules.
- C. Deploy a Kubernetes NodePort service for each microservice and configure an OCI NetworkLoad Balancer to forward traffic to the NodePort services on the worker nodes.
- D. Deploy a Kubernetes LoadBalancer service, which automatically provisions an OCI Regional Load Balancer to distribute traffic to the microservice pods.
正解：B
解説：
* Goal: Layer 7 routing for OKE microservices via a single entry point.
* Option A: Manual configuration is inefficient and doesn't support path-based routing-incorrect.
* Option B: LoadBalancer service provisions a Layer 4 balancer, not Layer 7 path routing-incorrect.
* Option C: NodePort with NLB is Layer 4, less secure, and lacks path routing-incorrect.
* Option D: Ingress controller with Regional Load Balancer (Application LB) provides Layer 7 routing based on paths-correct and efficient.
* Conclusion: Option D is the best integration method.
Oracle states:
* "Use a Kubernetes Ingress controller with OCI Regional Load Balancer for Layer 7 routing to OKE microservices based on request paths."This supports Option D. Reference:OKE Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/ContEng/Tasks/contengnetworking.htm).
質問 # 72
For a multi-tier architecture with a strict compliance requirement to log all user access to private resources, which Bastion service configuration is most suitable?
- A. Dynamic port forwarding sessions with no logging enabled.
- B. Using a jump server with manually configured logging.
- C. Managed Bastion sessions with detailed session logging enabled.
- D. SSH port forwarding sessions with minimal audit logs.
正解：C
解説：
* 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).
質問 # 73
Which OCI resource is used to establish private connectivity between two VCNs within the same region, facilitating direct, low-latency communication?
- A. Dynamic Routing Gateway (DRG)
- B. Service Gateway
- C. Local Peering Gateway (LPG)
- D. Internet Gateway
正解：C
解説：
* Objective: Identify the OCI resource for private, low-latency VCN-to-VCN connectivity in the same region.
* Option A: DRG connects VCNs to external networks (e.g., on-premises) or across regions, not for same-region peering-incorrect.
* Option B: LPG is designed for private peering of VCNs within the same region, ensuring low-latency communication-correct.
* Option C: Internet Gateway provides public internet access, not private connectivity-incorrect.
* Option D: Service Gateway connects VCNs to OCI services, not other VCNs-incorrect.
* Conclusion: Option B is the appropriate resource.
Oracle documentation states:
* "A Local Peering Gateway (LPG) enables private connectivity between two VCNs in the same region, providing direct, low-latency communication."This confirms Option B. Reference:Local VCN Peering Overview - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/localVCNpeering.
htm).
質問 # 74
Your company is migrating several applications to OCI and requires a highly available and resilient VPN connection between your on-premises network and OCI. You need to ensure that if one VPN tunnel fails, traffic automatically fails over to a backup tunnel with minimal disruption. Which configuration would BEST achieve high availability and automatic failover for your OCI Site-to-Site VPN connection?
- A. Configure a single VPN connection with two tunnels, ensuring that both tunnels use different CPE IP addresses on the on-premises side.
- B. Configure a single VPN connection with two tunnels using the same CPE IP address.
- C. Configure two separate VPN connections, each with a single tunnel, pointing to different CPE IP addresses on the on-premises side. Advertise the same prefixes over both VPN connections using BGP.
- D. Configure a single VPN connection with a single tunnel and rely on the underlying OCI infrastructure for automatic failover.
正解：A
解説：
* Understand the Requirement: The goal is high availability (HA) and automatic failover for a Site-to- Site VPN between an on-premises network and OCI with minimal disruption.
* Evaluate Option A: A single VPN connection with one tunnel lacks redundancy. If the tunnel fails, there's no failover mechanism, as OCI doesn't inherently provide automatic failover for a single tunnel.
This is a single point of failure.
* Evaluate Option B: A single VPN connection with two tunnels using different CPE IP addresses leverages OCI's IPSec VPN capabilities. OCI supports multiple tunnels per VPN connection, and using distinct CPE IPs (e.g., via different ISPs or devices) ensures that if one tunnel fails (due to ISP or CPE failure), the second tunnel remains active. OCI's Dynamic Routing Gateway (DRG) automatically reroutes traffic to the active tunnel using IKE and IPSec health checks.
* Evaluate Option C: Two separate VPN connections, each with one tunnel and different CPE IPs, also provide HA. Using BGP, routes are advertised redundantly. However, managing two VPN connections is more complex than a single connection with two tunnels, and BGP failover might introduce slight delays compared to IPSec tunnel failover.
* Evaluate Option D: Two tunnels with the same CPE IP address within one VPN connection don't provide true HA. If the CPE or its ISP fails, both tunnels fail, as they share a single point of failure.
* Conclusion: Option B is the simplest, most resilient configuration that ensures automatic failover with minimal disruption using OCI's native VPN capabilities.
OCI's Site-to-Site VPN supports multiple tunnels within a single IPSec connection for redundancy.
According to the Oracle Help Center:
* "You can configure multiple tunnels for a single IPSec connection to provide redundancy. OCI uses IKE (Internet Key Exchange) to monitor tunnel health and automatically fails over to an active tunnel if one becomes unavailable."
* "For maximum availability, use different CPE public IP addresses for each tunnel (e.g., different ISPs or devices)."This aligns with Option B, ensuring HA without the complexity of separate VPN connections or BGP. Reference:Site-to-Site VPN Overview - Oracle Help Center(docs.oracle.com/en-us
/iaas/Content/Network/Tasks/settingupIPSec.htm).
質問 # 75
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. IPv6 address assignment is only supported on instances launched in public subnets.
- C. No further steps are needed. Instances will automatically receive IPv6 addresses within the configured subnets upon launch.
- D. Make sure the "Assign public IPv4 address" option is not selected during instance creation. This will force the instance to default to IPv6 allocation.
正解：A
解説：
* 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.
質問 # 76
Your organization uses a combination of OCI and AWS. Applications in OCI frequently access services hosted in AWS. You are experiencing slow and inconsistent data transfer speeds when transferring large files between the two clouds. You have a Site-to-Site VPN, but are considering other options. Which option is NOT a valid design consideration for improving the data transfer performance between OCI and AWS?
- A. Evaluate the distance between the OCI and AWS regions you are using.
- B. Determine the pricing scheme used for all OCI compute resources so you can predict when you need to scale bandwidth.
- C. Deploy a dedicated interconnect through a network service provider that specializes in connecting OCI and AWS.
- D. Evaluate using a third-party WAN optimization solution.
正解：B
解説：
* Objective: Improve OCI-AWS data transfer performance.
* Option A: Region distance affects latency-valid.
* Option B: Dedicated interconnect boosts bandwidth and stability-valid.
* Option C: Compute pricing doesn't influence inter-cloud bandwidth-invalid.
* Option D: WAN optimization can enhance transfer efficiency-valid.
* Conclusion: Option C is not a design consideration for performance.
Oracle notes:
* "To optimize OCI-AWS connectivity, consider region proximity, dedicated interconnects, or WAN optimization. Compute pricing is unrelated to network performance."This excludes Option C.
Reference:Hybrid Cloud Networking - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network
/Concepts/hybridcloud.htm).
質問 # 77
Which OCI component facilitates transitive routing between VCNs in different regions via a dedicated, private network backbone, while also enabling connectivity to on-premises networks?
- A. Service Gateway
- B. Dynamic Routing Gateway (DRG)
- C. Local Peering Gateway (LPG)
- D. Internet Gateway
正解：B
解説：
* Requirement:Transitive routing across regions and to on-premises, privately.
* Components:
* LPG:Intra-region VCN peering; limited scope.
* DRG:Cross-region and on-premises routing via private backbone.
* Service Gateway:OCI service access; not transitive.
* Internet Gateway:Public internet; not private.
* Evaluate Options:
* A:Region-specific; incorrect.
* B:Supports multi-region and on-premises; correct.
* C:Service-focused; incorrect.
* D:Public; incorrect.
* Conclusion:DRG is the key component.
DRG enables complex routing scenarios. The Oracle Networking Professional study guide notes, "The Dynamic Routing Gateway (DRG) facilitates transitive routing between VCNs in different regions and on- premises networks over OCI's private backbone" (OCI Networking Documentation, Section: Dynamic Routing Gateway). This meets both requirements efficiently.
質問 # 78
Your company has deployed a mission-critical application on OCI that requires consistent, predictable network performance. You have established a FastConnect circuit to connect your on-premises data center to OCI. You observe that the network latency varies throughout the day, and you suspect that other traffic is impacting the performance of your application. Which FastConnectfeature can you leverage to prioritize traffic for your mission-critical application and improve its network performance?
- A. FastConnect Jumbo Frames
- B. FastConnect VLAN Tagging
- C. FastConnect Quality of Service (QoS)
- D. FastConnect BGP Communities
正解：C
解説：
* Goal:Prioritize application traffic over FastConnect for consistent performance.
* Features:
* VLAN Tagging:Segments traffic, no prioritization.
* QoS:Prioritizes traffic based on rules.
* BGP Communities:Route policy, not QoS.
* Jumbo Frames:Increases MTU, not priority.
* Evaluate Options:
* A:No prioritization; incorrect.
* B:QoS ensures priority; correct.
* C:Routing control, not QoS; incorrect.
* D:Throughput, not latency control; incorrect.
* Conclusion:QoS is the right feature.
FastConnect QoS manages traffic priority. The Oracle Networking Professional study guide explains,
"FastConnect Quality of Service (QoS) allows you to prioritize critical traffic over the circuit, ensuring consistent performance despite competing traffic" (OCI Networking Documentation, Section: FastConnect Features). This addresses latency variability effectively.
質問 # 79
You are managing a Site-to-Site VPN connection between your on-premises network and OCI. You notice that the VPN tunnel is frequently dropping and re-establishing. You have verified the internet connectivity at both ends and confirmed that the IKE (Internet Key Exchange) parameters are correctly configured. Which of the following is the most likely cause of the intermittent VPN tunnel disconnections?
- A. The on-premises firewall is configured with incorrect NAT-Traversal settings.
- B. The OCI Dynamic Routing Gateway (DRG) is experiencing a temporary outage.
- C. The on-premises Customer-Premises Equipment (CPE) is configured with an incorrect public IP address.
- D. There is a misconfiguration in the security rules, blocking the IKE or ESP (Encapsulating Security Payload) traffic.
正解：D
解説：
* Symptoms:VPN tunnel drops intermittently despite stable internet and IKE settings.
* VPN Components:Requires IKE (UDP 500/4500) and ESP (IP 50) traffic.
* Evaluate Options:
* A:Incorrect CPE IP would prevent tunnel establishment, not intermittent drops; incorrect.
* B:DRG outage would cause full downtime, not intermittent; unlikely.
* C:Security rules blocking IKE/ESP intermittently (e.g., rate limiting) is common; most likely.
* D:NAT-Traversal issues typically prevent initial setup, not intermittent drops; less likely.
* Conclusion:Security rule misconfiguration is the most probable cause.
VPN stability depends on unblocked IKE and ESP traffic. The Oracle Networking Professional study guide notes, "Intermittent VPN tunnel drops are often caused by security rules or firewalls blocking IKE (UDP 500
/4500) or ESP (IP Protocol 50) traffic" (OCI Networking Documentation, Section: Site-to-Site VPN Troubleshooting). This aligns with the scenario's symptoms.
質問 # 80
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