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Oracle Cloud Infrastructure 2025 Networking Professional 認定 1z0-1124-25 試験問題 (Q24-Q29):

質問 # 24
When migrating workloads requiring high availability and redundancy for on-premises connectivity to OCI, which approach is recommended?

A. Dual FastConnect connections with diverse paths
B. Site-to-Site VPN over a single internet connection
C. Internet Gateway with multiple public IPs
D. Single FastConnect connection

正解：A

解説：
* Requirements: HA and redundancy for on-premises-to-OCI connectivity.
* Option A: Single FastConnect lacks redundancy-incorrect.
* Option B: Single VPN over internet has no redundancy and poor performance-incorrect.
* Option C: Dual FastConnect with diverse paths ensures HA and redundancy via separate routes- correct.
* Option D: Internet Gateway with public IPs isn't dedicated or redundant-incorrect.
* Conclusion: Option C is the recommended approach.
Oracle advises:
* "For high availability, use dual FastConnect connections with diverse paths to eliminate single points of failure in hybrid connectivity."This supports Option C. Reference:FastConnect High Availability - Oracle Help Center(docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#ha).

質問 # 25
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 NAT Gateway in each VCN and configure route rules to route traffic to the other NAT Gateway's public IP address.
D. Create a Service Gateway in each VCN, and configure a Dynamic Routing Gateway (DRG) toroute traffic between the Service Gateways.

正解：A

解説：
* 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).

質問 # 26
In a multi-tier architecture with multiple application instances across different private subnets, which Bastion service approach minimizes the need for continuous maintenance of individual session configurations?

A. Deploying separate Bastion hosts in each private subnet.
B. Implementing a centralized Bastion service with managed sessions and predefined target resource configurations.
C. Creating individual Bastion sessions for each application instance.
D. Using dynamic port forwarding with SOCKS5 sessions allowing users to define their own targets.

正解：B

解説：
* Goal:Minimize maintenance of Bastion session configurations.
* Bastion Options:
* Individual Sessions:High maintenance per instance.
* Dynamic Port Forwarding:Flexible but user-managed, prone to errors.
* Centralized Service:Predefined targets, low maintenance.
* Separate Hosts:Increases complexity and overhead.
* Evaluate Options:
* A:Per-instance sessions require constant updates; inefficient.
* B:SOCKS5 shifts burden to users; moderate maintenance.
* C:Centralized with managed sessions reduces effort; optimal.
* D:Multiple hosts multiply management tasks; worst option.
* Conclusion:Centralized Bastion with managed sessions is most efficient.
OCI Bastion service supports centralized management. The Oracle Networking Professional study guide notes, "A centralized Bastion service with managed sessions and predefined target configurations minimizes administrative overhead by streamlining access to private subnet resources" (OCI Networking Documentation, Section: Bastion Service). This approach leverages OCI's automation capabilities.

質問 # 27
Your company has two FastConnect circuits connecting your on-premises network to OCI. You want to implement a BGP configuration that ensures that traffic from OCI to your on-premises network is load- balanced across both FastConnect circuits. Which BGP configuration would BEST achieve load balancing across the two FastConnect circuits?

A. Configure local preference to be higher on one of the FastConnect virtual circuits.
B. Advertise the same prefixes with the same attributes (including AS Path) across both FastConnect circuits.
C. Configure AS Path Prepending on one of the FastConnect virtual circuits.
D. Configure different MED values on each FastConnect virtual circuit.

正解：B

解説：
* Objective: Load balance OCI-to-on-premises traffic over two FastConnect circuits.
* Option A: Different MEDs prioritize one path, not balance-incorrect.
* Option B: Same prefixes and attributes enable Equal-Cost Multi-Path (ECMP) routing, balancing traffic-correct.
* Option C: AS Path Prepending prefers one path-incorrect.
* Option D: Local preference prioritizes one path-incorrect.
* Conclusion: Option B ensures load balancing.
Oracle states:
* "For load balancing over multiple FastConnect circuits, advertise identical prefixes with the same BGP attributes to enable ECMP."This supports Option B. Reference:FastConnect BGP - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/fastconnect.htm#BGP).

質問 # 28
You are designing a backup solution in OCI. Compute instances in a private subnet need to back up data to OCI Object Storage. Security policy mandates that data transfer must not traverse the public internet. You need to choose the most secure and cost-effective method for accessing Object Storage. Which endpoint
/gateway configuration should you implement?

A. Configure a NAT Gateway and use public Object Storage endpoints with HTTPS enabled.
B. Configure a Dynamic Routing Gateway (DRG) and FastConnect to a remote region and use public Object Storage endpoints.
C. Configure an Internet Gateway and use public Object Storage endpoints.
D. Configure a Service Gateway with the Oracle Services Network service CIDR label for your region, and use regional Object Storage endpoints.

正解：D

解説：
* Requirement Analysis:The solution must ensure private access to Object Storage without public internet traversal, while being cost-effective.
* Evaluate OCI Components:
* Internet Gateway:Provides public internet access, unsuitable for private connectivity.
* NAT Gateway:Allows outbound internet access from private subnets, but traffic still exits OCI.
* Service Gateway:Enables private access to OCI services like Object Storage within the same region.
* DRG with FastConnect:Used for on-premises connectivity, not intra-OCI service access.
* Option Assessment:
* A:Uses public internet, violating the security policy.
* B:HTTPS encrypts data, but traffic traverses the internet via NAT, violating the policy.
* C:Service Gateway keeps traffic within OCI's private network, meeting security and cost goals.
* D:Overly complex and costly, with public endpoints contradicting the requirement.
* Conclusion:Service Gateway with regional Object Storage endpoints ensures private, secure, and cost- effective access.
The Service Gateway is designed for private access to OCI services like Object Storage, avoiding the public internet. The Oracle Networking Professional study guide states, "A Service Gateway allows instances in a private subnet to access supported OCI services without an Internet Gateway or NAT Gateway, ensuring traffic remains within the Oracle network" (OCI Networking Documentation, Section: Service Gateway).
Using the Oracle Services Network service CIDR label for the region ensures compatibility with Object Storage endpoints, optimizing cost and security.

質問 # 29
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