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質問 # 15
Which THREE protocols are supported by the Oracle Cloud Infrastructure (OCI) private Network Load Balancers?
- A. UDP
- B. iSCSI
- C. BGP
- D. TCP
- E. ICMP
- F. HTTP
正解：A、D、F
解説：
The OCI Private Network Load Balancer supports multiple protocols for managing traffic efficiently across your instances within a private subnet. Specifically, it supports:
UDP (User Datagram Protocol): Commonly used for applications that require fast, connectionless communication, such as video streaming or DNS services.
TCP (Transmission Control Protocol): A reliable, connection-oriented protocol, widely used for web traffic and other applications requiring data integrity.
HTTP (Hypertext Transfer Protocol): Frequently used for web traffic, it is an application-layer protocol built on top of TCP and enables communication between web browsers and servers.
The combination of these protocols allows the OCI Network Load Balancer to manage diverse workloads, including web services and real-time applications.
For reference:
OCI Load Balancer Documentation
質問 # 16
What are the two types of capture filters that can be created for network monitoring?
- A. Flow log capture filters and VTAP capture filters
- B. Flow control capture filters and traffic capture filters
- C. VTAP capture filters and network capture filters
- D. Flow log capture filters and packet capture filters
正解：A
解説：
In Oracle Cloud Infrastructure (OCI), there are two primary types of capture filters used for network monitoring:
Flow Log Capture Filters: These filters are used to capture and log network flow information (e.g., source and destination IP addresses, ports, protocols). Flow logs provide insights into the traffic patterns within your VCN.
VTAP Capture Filters: Virtual Test Access Point (VTAP) capture filters allow you to capture and inspect traffic from specific network interfaces or subnets without affecting the flow of traffic. This is particularly useful for deep packet inspection and monitoring purposes.
Reference:
Oracle Cloud Infrastructure Documentation: Flow Logs
Oracle Cloud Infrastructure Documentation: VTAP
質問 # 17
Why is the OCI Inter-Region Latency dashboard useful for optimizing data transfer and backup strategies?
- A. It's designed for troubleshooting latency issues within your specific applications.
- B. It focuses solely on latency within your own tenancy.
- C. It offers a current and historical view of latency snapshots.
- D. It provides real-time data specific to your tenancy's workloads.
正解：C
解説：
The OCI Inter-Region Latency dashboard is useful for optimizing data transfer and backup strategies because it provides both current and historical views of latency snapshots between OCI regions. This information helps you understand the network performance between regions over time, allowing you to optimize the placement of resources and data transfer operations.
Optimization Use: By analyzing latency data, you can make informed decisions on where to store backups and how to efficiently transfer data across regions, potentially reducing costs and improving performance.
Reference:
Oracle Cloud Infrastructure Documentation: Inter-Region Latency Dashboard
質問 # 18
How will moving a database instance to a different compartment impact user access?
- A. Compartments prevent resource movement.
- B. Access will be revoked for all users.
- C. IAM policies are not tied to compartments.
- D. Compartments are not covered by IAM policies.
正解：B
解説：
In Oracle Cloud Infrastructure (OCI), when you move a database instance to a different compartment, the following impact on user access occurs:
Impact of Moving Resources: When you move a resource, like a database instance, to a different compartment, the IAM policies that grant access to that resource in the original compartment no longer apply. This effectively revokes access for users or groups unless equivalent policies are in place in the new compartment.
Restoring Access: To restore access, you would need to create new IAM policies in the destination compartment that grant the necessary permissions to the users or groups who need access.
Relevant OCI Documentation:
Managing Compartments
Moving Resources
These resources provide detailed steps on how compartment changes impact resource access and management.
質問 # 19
Which TWO statements about the Oracle Cloud Infrastructure (OCI) File Storage Service are accurate?
- A. Customers can encrypt the communication to a mount target via export options.
- B. File systems use Oracle-managed keys by default.
- C. Communication with file systems in a mount target is encrypted via HTTPS.
- D. Customers can encrypt data in their file system using their own Vault encryption key.
正解：B、D
解説：
Oracle Cloud Infrastructure (OCI) File Storage Service offers robust encryption capabilities to ensure data security.
B . Customer-Managed Encryption: Customers can choose to encrypt their data using their own keys stored in the OCI Vault service. This gives customers control over their encryption keys and enhances data security.
D . Oracle-Managed Encryption: By default, all data stored in OCI File Storage is encrypted using Oracle-managed keys. This ensures that data is encrypted at rest without requiring any action from the customer.
Incorrect Statements:
A . Communication is not encrypted via HTTPS when accessing file systems; instead, encryption in transit is typically managed via NFS over TLS.
C . Encryption of communication to a mount target is handled via network configurations, not through export options.
Reference:
Oracle Cloud Infrastructure Documentation: File Storage Encryption
質問 # 20
With OCI's pricing of $0.0085 USD per Gigabyte for Outbound Data Transfer in North America, how much will they spend per month for 7 Petabytes of Outbound Data Transfer?
- A. $59,415.00
- B. $59,500.00
- C. $150,000.00
- D. $0.00 (free with OCI)
正解：B
解説：
To calculate the monthly cost for 7 Petabytes (PB) of outbound data transfer at a rate of $0.0085 per GB in North America:
Calculation:
1 PB = 1,000,000 GB
7 PB = 7,000,000 GB
Cost = 7,000,000 GB * $0.0085/GB = $59,500.00
Thus, the cost for 7 PB of outbound data transfer per month is $59,500.00.
Reference:
Oracle Cloud Infrastructure Pricing: OCI Pricing
質問 # 21
Which TWO are key benefits of setting up Site-to-Site VPN on Oracle Cloud Infrastructure (OCI)?
- A. When setting up Site-to-Site VPN, customers can expect bandwidth above 2 Gbps.
- B. When setting up Site-to-Site VPN, it creates a private connection that provides consistent network experience.
- C. When setting up Site-to-Site VPN, OCI provisions redundant VPN tunnels.
- D. When setting up Site-to-Site VPN, customers can configure it to use static or dynamic routing (BGP).
正解：C、D
解説：
Setting up a Site-to-Site VPN on Oracle Cloud Infrastructure offers several key benefits related to connectivity and reliability:
Static or Dynamic Routing (BGP): OCI allows customers to configure Site-to-Site VPN with either static routing or dynamic routing using Border Gateway Protocol (BGP). This flexibility enables customers to choose the routing method that best suits their network configuration and requirements.
Redundant VPN Tunnels: OCI automatically provisions redundant VPN tunnels when you set up a Site-to-Site VPN. These redundant tunnels ensure high availability and fault tolerance, so if one tunnel fails, traffic can continue to flow through the other tunnel without interruption.
Bandwidth Considerations: While the VPN provides a reliable connection, it typically does not exceed 2 Gbps in bandwidth. Higher bandwidth connections usually require FastConnect.
Private Connection: The VPN does create a secure and private connection between on-premises data centers and OCI, but it does not inherently provide a consistent network experience in the way that a dedicated connection like FastConnect does.
Relevant OCI Documentation:
Site-to-Site VPN Overview
Configuring Routing for VPNs
These references detail the benefits and technical specifications of setting up Site-to-Site VPNs on OCI.
質問 # 22
Which statement is true about instance configurations and instance pools in OCI?
- A. You can delete an instance configuration if it is associated with an instance pool.
- B. You can only delete an instance configuration if it is not associated with any instance pool.
- C. You cannot reuse the same instance configuration for multiple instance pools.
- D. An instance pool can have multiple instance configurations associated with it.
正解：B
質問 # 23
Which TWO statements are TRUE about Private IP addresses in Oracle Cloud Infrastructure (OCI)?
- A. By default, the primary VNIC of an instance in a subnet has one primary private IP address and one secondary private IP address.
- B. By default, the primary VNIC of an instance in a subnet has one primary private IP address.
- C. A private IP can have an optional public IP assigned to it if it resides in a public subnet.
- D. Each VNIC can only have one private IP address.
正解：B、C
解説：
In Oracle Cloud Infrastructure (OCI), understanding how private IP addresses work is crucial for configuring network interfaces and managing instances within your Virtual Cloud Network (VCN).
Primary VNIC and Private IP Address:
When an instance is launched in OCI, it is attached to a Virtual Network Interface Card (VNIC). The primary VNIC, which is automatically created during the instance launch, is associated with a primary private IP address by default. This private IP address is essential for the instance to communicate within the VCN. The primary private IP address is automatically assigned and cannot be removed from the primary VNIC while the instance is running. This supports the statement C.
Additional Private IPs:
Contrary to statement B, each VNIC can indeed have multiple private IP addresses, but by default, the primary VNIC comes with only one primary private IP. You can manually add secondary private IPs if needed. However, the additional IPs are not assigned by default; hence, A is incorrect.
Public IP Association:
For instances requiring internet access, a public IP address can be optionally assigned to the private IP address if the instance is in a public subnet. This is critical for scenarios where an instance needs to communicate with the internet or external networks. This aligns with statement D.
Relevant OCI Documentation:
Oracle Cloud Infrastructure Networking Overview
VNICs and Private IPs
These references provide additional context and detail on how private IP addresses work within OCI and clarify the correct statements.
質問 # 24
Which OCI Object Storage tier is suitable for storing the backup to minimize cost while meeting the requirements of immediate accessibility and retention of 31 days?
- A. Standard tier
- B. Archive tier
- C. Infrequent Access tier
- D. Auto-Tiering tier
正解：C
解説：
The Infrequent Access tier in OCI Object Storage is suitable for storing backups that need to be immediately accessible and retained for a specific period, such as 31 days, while also minimizing costs. This tier offers a balance between cost and accessibility, charging lower storage costs compared to the Standard tier but still allowing quick access to the data.
Use Case: The Infrequent Access tier is designed for data that is not frequently accessed but must remain readily available when needed, making it ideal for backup storage.
Reference:
Oracle Cloud Infrastructure Documentation: Object Storage Tiers
質問 # 25
Which statement is TRUE about delegating an existing domain to the Oracle Cloud Infrastructure (OCI) DNS service?
- A. All domains can be retrieved to OCI DNS via DYN.
- B. Domains can be delegated to OCI DNS via FastConnect partners.
- C. Domains can be delegated to OCI DNS from the Domain Registrar's self-service portal.
- D. Domains can be self-delegated to OCI DNS from its own service portal.
正解：C
解説：
To delegate a domain to the Oracle Cloud Infrastructure (OCI) DNS service, the domain needs to be pointed to OCI's DNS servers. This can be done through the Domain Registrar's self-service portal, where you update the name servers for your domain to OCI's DNS servers.
Process: You typically log into the domain registrar where your domain is registered and replace the existing name servers with the name servers provided by OCI DNS. Once this is done, DNS queries for your domain will be directed to OCI DNS.
Reference:
Oracle Cloud Infrastructure Documentation: Managing DNS Zones
質問 # 26
A financial firm is designing an application architecture for its online trading platform that should have high availability and fault tolerance. What should the architect do to avoid any costly service disruptions and ensure data durability?
- A. Create a new Object Storage bucket in another region and configure recycle policy to move data every 5 days.
- B. Create a lifecycle policy to regularly send data from the Standard to Archive storage.
- C. Copy the Object Storage bucket to a block volume.
- D. Create a replication policy to send data to a different bucket in another OCI region.
正解：D
解説：
For an online trading platform requiring high availability and fault tolerance, it's critical to ensure data durability and avoid any costly service disruptions. In Oracle Cloud Infrastructure (OCI), Object Storage is often used to store critical data, such as transaction logs or user data, due to its scalability, durability, and reliability.
Option B is the most suitable approach for ensuring data durability and availability across regions. Here's why:
Cross-Region Replication (CRR): OCI offers a feature called Cross-Region Replication for Object Storage. This feature allows you to automatically and asynchronously replicate objects in a bucket from one OCI region to another. This setup ensures that even if one region experiences a failure, the data is still available in another region, thereby meeting the requirements for high availability and fault tolerance.
Data Durability: By replicating data to another region, you protect against regional outages. OCI guarantees 99.95% availability for replicated data, which is critical for a financial firm's trading platform where data consistency and durability are paramount.
Disaster Recovery: With data replicated in another region, the trading platform can quickly switch to using the data in the secondary region in case of a disaster in the primary region. This setup significantly reduces recovery time objectives (RTO) and ensures business continuity.
Reference:
Oracle Cloud Infrastructure Documentation: Cross-Region Replication for Object Storage Oracle Whitepaper: High Availability and Disaster Recovery in Oracle Cloud Infrastructure Explanation of Incorrect Options:
Option A: Creating a new Object Storage bucket in another region and configuring a recycle policy to move data every 5 days does not provide real-time data availability or the fault tolerance required for a financial application. Recycle policies are intended for managing the lifecycle of data, not for high availability or disaster recovery.
Option C: While lifecycle policies are useful for moving less frequently accessed data to a more cost-effective storage tier (e.g., from Standard to Archive), they do not address cross-region redundancy or real-time availability, which are critical for this use case.
Option D: Copying an Object Storage bucket to a block volume is not a recommended practice for ensuring data durability and fault tolerance. Block volumes are used for persistent storage attached to compute instances, and copying object storage data to block volumes does not achieve the same level of redundancy and cross-region availability as replication policies.
Thus, Option B is the correct and most efficient method for ensuring high availability and fault tolerance in this scenario.
質問 # 27
Why was SSH still possible after port 22 was removed from the Security Lists?
- A. The VCN where that compute instance resides still has an Internet Gateway.
- B. The VNIC of that compute instance is attached to a Network Security Group (NSG).
- C. The VCN where that compute instance resides still has a route rule.
- D. The VNIC of that compute instance is attached to a Cluster Network.
正解：B
解説：
Even after removing port 22 from the Security Lists, SSH was still possible because the Virtual Network Interface Card (VNIC) of the compute instance is attached to a Network Security Group (NSG).
NSGs: NSGs provide a more flexible and granular way to manage security rules compared to Security Lists. They allow you to apply security rules directly to VNICs associated with resources such as compute instances. If an NSG allows traffic on port 22, SSH will still be possible, regardless of the Security List settings.
Reference:
Oracle Cloud Infrastructure Documentation: Security Lists and Network Security Groups
質問 # 28
Which TWO statements about the Oracle Cloud Infrastructure (OCI) File Storage Service are accurate?
- A. Customers can encrypt the communication to a mount target via export options.
- B. File systems use Oracle-managed keys by default.
- C. Communication with file systems in a mount target is encrypted via HTTPS.
- D. Customers can encrypt data in their file system using their own Vault encryption key.
正解：B、D
解説：
Oracle Cloud Infrastructure (OCI) File Storage Service offers robust encryption capabilities to ensure data security.
B . Customer-Managed Encryption: Customers can choose to encrypt their data using their own keys stored in the OCI Vault service. This gives customers control over their encryption keys and enhances data security.
D . Oracle-Managed Encryption: By default, all data stored in OCI File Storage is encrypted using Oracle-managed keys. This ensures that data is encrypted at rest without requiring any action from the customer.
Incorrect Statements:
A . Communication is not encrypted via HTTPS when accessing file systems; instead, encryption in transit is typically managed via NFS over TLS.
C . Encryption of communication to a mount target is handled via network configurations, not through export options.
Reference:
Oracle Cloud Infrastructure Documentation: File Storage Encryption
質問 # 29
You enabled Cross Region Replication for the volume and selected US West (San Jose) as the destination region. What should you do to create a new volume from the volume replica?
- A. Trigger the replica.
- B. No action required. By default, the replica is available as a block volume.
- C. Activate the replica.
- D. Initiate the replica.
正解：B
解説：
When Cross-Region Replication is enabled for a block volume in Oracle Cloud Infrastructure (OCI), the replication process automatically creates and maintains a synchronized copy of the block volume in the selected destination region (in this case, US West (San Jose)).
Replica Availability: The replicated volume is immediately available as a block volume in the destination region. You do not need to take any additional action to activate or trigger the replica.
Creating New Volumes: Since the replica is automatically available as a block volume, you can directly use it to create a new volume in the destination region without any manual intervention.
Relevant OCI Documentation:
Cross-Region Block Volume Replication
This documentation outlines how cross-region replication works and confirms that no additional steps are needed to create a new volume from a replica
質問 # 30
How many capacity reservations would you create to meet the requirement for high availability and distribution across Availability Domains?
- A. Two
- B. Four
- C. Three
- D. One
正解：C
解説：
In Oracle Cloud Infrastructure (OCI), to ensure high availability and distribution across Availability Domains (ADs), the recommended approach is as follows:
Capacity Reservations for High Availability: To achieve high availability, especially across all three Availability Domains in a region, you should create three capacity reservations. Each reservation corresponds to one AD, ensuring that your instances or resources are evenly distributed and resilient to AD-level failures.
Why Three: This setup provides redundancy and load distribution across the ADs, meeting the high availability requirements.
Relevant OCI Documentation:
Capacity Reservations
This document outlines how to create and manage capacity reservations to meet high availability and fault tolerance requirements.
質問 # 31
Which OCI feature should be used to ensure that communication between database servers and OCI Object Storage is secure?
- A. Use a NAT Gateway
- B. Use a Local Peering Gateway
- C. Use a VPN Gateway
- D. Use a Service Gateway
正解：D
解説：
To ensure secure communication between database servers and OCI Object Storage, you should use a Service Gateway. A Service Gateway enables instances in your VCN to privately access OCI services like Object Storage without traversing the public internet.
Security: The traffic between your database servers and Object Storage remains within the Oracle network, providing a secure and high-performance connection.
Reference:
Oracle Cloud Infrastructure Documentation: Service Gateway Overview
質問 # 32
Which image option allows you to create identical instances with minimal effort?
- A. Select an image from the OCI Marketplace
- B. Create a custom image
- C. Use Oracle-provided images
- D. Bring your own image
正解：B
解説：
When you need to create identical instances with minimal effort, creating a custom image is the best option.
Custom Images: A custom image captures the exact configuration of an instance, including the OS, software, configurations, and data. By using a custom image, you can easily replicate the same setup across multiple instances, ensuring consistency and reducing the need for manual configuration each time.
Other Options:
Bring Your Own Image: This allows you to import your custom OS image into OCI, but it's more suited for cases where you are migrating from another environment.
Select an Image from the OCI Marketplace: This provides pre-configured images from Oracle or third parties, but they may require additional setup to match your specific requirements.
Use Oracle-Provided Images: These are basic images provided by Oracle, which may not include the specific customizations you need.
Relevant OCI Documentation:
Custom Images Overview
This resource explains how to create and use custom images for quickly deploying identical instances.
質問 # 33
Which statement is NOT true about the Oracle Cloud Infrastructure (OCI) Object Storage service?
- A. Object lifecycle rules can be used to archive or delete objects.
- B. Object Storage resources can be shared across tenancies.
- C. Immutable option for data stored in Object Storage can be set via retention rules.
- D. Object Versioning is enabled at the namespace level.
正解：B
解説：
Oracle Cloud Infrastructure (OCI) Object Storage is a scalable, highly durable service that allows you to store any type of data in a secure and cost-effective manner. The correct and incorrect statements regarding OCI Object Storage are as follows:
A . Immutable Option: You can indeed set an immutable option for data in Object Storage using retention rules. This feature ensures that once data is written, it cannot be modified or deleted until the retention period expires, making it ideal for regulatory compliance.
C . Object Lifecycle Rules: Object lifecycle policies allow you to automate the archiving or deletion of objects based on their age or other criteria, helping manage storage costs and data retention efficiently.
D . Object Versioning: Versioning is enabled at the bucket level, not the namespace level. However, once enabled for a bucket, it helps retain, retrieve, and restore every version of every object stored in that bucket.
B . Object Storage Sharing Across Tenancies: This statement is not true. OCI Object Storage buckets and objects are specific to a tenancy and cannot be shared across different tenancies directly. Access to Object Storage resources is controlled within a single tenancy through IAM policies.
Relevant OCI Documentation:
OCI Object Storage Overview
Object Lifecycle Management
These references provide details on how Object Storage functions and the features available.
質問 # 34
Which components are required for establishing remote peering between two Virtual Cloud Networks (VCNs) in Oracle Cloud Infrastructure (OCI)?
- A. A single VCN with nonoverlapping CIDRS in each region, a dynamic routing gateway (DRG) attached to each VCN, and a direct connection between the DRGS.
- B. Two VCNs with nonoverlapping CIDRS in the same region, a dynamic routing gateway (DRG) attached to each VCN, and a direct connection between the DRGs.
- C. Two VCNs with overlapping CIDRS in different regions, a virtual private network (VPN) gateway attached to each VCN, and a direct connection between the VPN gateways.
- D. Two VCNs with nonoverlapping CIDRS in different regions, a dynamic routing gateway (DRG) attached to each VCN, a remote peering connection (RPC) on each DRG, and a connection established between the RPCs.
正解：D
解説：
Remote peering in Oracle Cloud Infrastructure allows two VCNs in different regions to communicate securely. To establish remote peering, the following components are required:
Two VCNs with Nonoverlapping CIDRs:
The CIDR blocks of the two VCNs must not overlap. This is crucial to avoid routing conflicts and ensure that traffic is correctly routed between the VCNs.
Dynamic Routing Gateway (DRG) Attached to Each VCN:
A DRG is a virtual router that provides a path for traffic between the VCN and networks outside the VCN, such as other VCNs via remote peering, on-premises networks, or other cloud services. Each VCN needs its own DRG.
Remote Peering Connection (RPC):
An RPC is a specialized connection on the DRG used specifically for remote peering. You need to create an RPC on each DRG associated with the VCNs you wish to peer.
Connection Between RPCs:
Finally, a connection must be established between the RPCs of the two DRGs. This connection facilitates the secure and private exchange of traffic between the VCNs over Oracle's backbone network.
Incorrect Options:
Option A involves a single VCN, which does not fulfill the requirement of remote peering between two VCNs.
Option B involves overlapping CIDRs and VPN gateways, which are incorrect for remote peering.
Option C suggests peering within the same region, which would be considered local peering rather than remote peering.
Relevant OCI Documentation:
OCI Remote VCN Peering
Dynamic Routing Gateway (DRG) Overview
These resources provide a detailed guide on configuring remote peering in OCI, ensuring secure and effective communication between VCNs across regions.
質問 # 35
Which IAM Identity Domain type should you create for a full-featured Identity-as-a-Service (IDaaS) solution?
- A. External User
- B. Premium
- C. Oracle Apps Premium
- D. Free
正解：B
解説：
In Oracle Cloud Infrastructure (OCI), when you need a full-featured Identity-as-a-Service (IDaaS) solution, the appropriate Identity Domain type to create is Premium.
Premium Identity Domain: This option provides a comprehensive set of identity and access management (IAM) capabilities, including advanced security features, identity governance, and support for enterprise-grade integrations. It supports managing user identities, multifactor authentication, and various other identity services required for a robust IDaaS solution.
Other Options:
External User: This is a limited domain type typically used for managing users who only need access to specific external services.
Free: This domain type offers limited features and is not intended for full-featured enterprise IAM requirements.
Oracle Apps Premium: This is tailored for integrating with Oracle applications but does not offer the broad capabilities of the Premium option.
Relevant OCI Documentation:
Oracle Identity Domains Overview
This documentation explains the various identity domain types and their use cases within OCI.
質問 # 36
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