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質問 # 16
Why is the OCI Inter-Region Latency dashboard useful for optimizing data transfer and backup strategies?
- A. It offers a current and historical view of latency snapshots.
- B. It's designed for troubleshooting latency issues within your specific applications.
- C. It provides real-time data specific to your tenancy's workloads.
- D. It focuses solely on latency within your own tenancy.
正解：A
解説：
TheOCI Inter-Region Latency dashboardis 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.
References:
* Oracle Cloud Infrastructure Documentation:Inter-Region Latency Dashboard
質問 # 17
Which statement is TRUE about delegating an existing domain to the Oracle Cloud Infrastructure (OCI) DNS service?
- A. Domains can be delegated to OCI DNS via FastConnect partners.
- B. All domains can be retrieved to OCI DNS via DYN.
- 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.
References:
* Oracle Cloud Infrastructure Documentation:Managing DNS Zones
質問 # 18
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, it creates a private connection that provides consistent network experience.
- B. When setting up Site-to-Site VPN, customers can expect bandwidth above 2 Gbps.
- 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 # 19
Why is the Network Visualizer tool valuable for managing virtual network infrastructure on OCI?
- A. It offers real-time monitoring of network traffic.
- B. It provides detailed information about the physical network components.
- C. It visualizes the topology of all VCNS in a selected region and tenancy.
- D. It generates automated reports on network performance metrics.
正解：C
解説：
The Network Visualizer tool in Oracle Cloud Infrastructure is valuable because itvisualizes the topology of all Virtual Cloud Networks (VCNs)in a selected region and tenancy.
* Topology Visualization: The Network Visualizer provides a graphical representation of the network components and their relationships within a VCN, including subnets, route tables, gateways, and security lists. This visualization helps users understand the network architecture and troubleshoot issues effectively.
* Other Options:
* Real-time monitoring of network traffic (B),detailed information about physical network components (C), andautomated reports on network performance metrics (D)are not the primary functions of the Network Visualizer. These functionalities are typically handled by other OCI services or tools.
* Relevant OCI Documentation:
* Network Visualizer Overview
This documentation details the features and benefits of the Network Visualizer tool in OCI.
質問 # 20
Which components are required for establishing remote peering between two Virtual Cloud Networks (VCNs) in Oracle Cloud Infrastructure (OCI)?
- A. 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.
- 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. 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.
- D. 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.
正解：A
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 Ainvolves a single VCN, which does not fulfill the requirement of remote peering between two VCNs.
* Option Binvolves overlapping CIDRs and VPN gateways, which are incorrect for remote peering.
* Option Csuggests 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 # 21
You want to protect your VM instance from low-level threats, such as rootkits and bootkits. What should you do?
- A. Use Vulnerability Scanning Service.
- B. Create a shielded instance.
- C. Use in-transit encryption.
- D. Create a burstable instance.
正解：B
解説：
To protect your VM instance from low-level threats, such as rootkits and bootkits, you shouldcreate a shielded instancein Oracle Cloud Infrastructure (OCI). Shielded instances are designed to provide enhanced security features, including:
* Secure Boot:Ensures that the instance boots only with trusted software.
* Measured Boot:Records boot metrics, allowing verification that the instance has not been tampered with.
* Trusted Platform Module (TPM):Provides additional security through cryptographic functions.
These features help protect against low-level threats that could compromise the integrity of the instance at boot time.
References:
* Oracle Cloud Infrastructure Documentation:Shielded Instances
質問 # 22
Which statement is TRUE about restoring a volume from a block volume backup in the Oracle Cloud Infrastructure (OCI) Block Volume service?
- A. You can restore a block volume backup to a larger volume size.
- B. You can only restore a volume to the same availability domain in which the original block volume resides.
- C. You can restore a volume from any full volume backup but not from an incremental backup.
- D. You can restore only one volume from a manual block volume backup.
正解：A
解説：
Restoring a block volume from a backup in OCI provides flexibility and options for scaling and recovery:
* Restoring to a Larger Volume Size: When restoring a block volume from a backup, you have the option to restore it to a volume that is larger than the original. This is particularly useful if you anticipate needing more storage capacity after the restore.
* Full and Incremental Backups: OCI supports both full and incremental backups. You can restore from any backup type, which makes it possible to restore data efficiently depending on the backup strategy used.
* Multiple Restores: Multiple volumes can be restored from a single backup, providing flexibility in disaster recovery scenarios.
* Availability Domain: The restored volume can be created in any availability domain within the same region, not necessarily the same one where the original volume was located.
* Relevant OCI Documentation:
* Block Volume Service Overview
* Restoring a Block Volume
These references explain the process and options available for restoring block volumes from backups.
質問 # 23
What is a key advantage of utilizing administrator roles for access control within OCI IAM identity domains?
- A. Simplify access management by eliminating policy creation
- B. Offer a wider range of permission combinations
- C. Can be used to grant access to resources outside the identity domain
- D. Provide granular control over user access to specific compartments
正解：C
質問 # 24
How many capacity reservations would you create to meet the requirement for high availability and distribution across Availability Domains?
- A. One
- B. Four
- C. Three
- D. Two
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 createthree 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 # 25
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. A private IP can have an optional public IP assigned to it if it resides in a public subnet.
- C. By default, the primary VNIC of an instance in a subnet has one primary private IP address.
- D. Each VNIC can only have one private IP address.
正解：B、C
質問 # 26
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. Initiate the replica.
- B. No action required. By default, the replica is available as a block volume.
- C. Trigger the replica.
- D. Activate the replica.
正解：D
質問 # 27
Which compute capacity type would you select to meet these requirements?
- A. Capacity reservation
- B. On-demand capacity
- C. Dedicated host
- D. Preemptible capacity
正解：C
質問 # 28
Why was SSH still possible after port 22 was removed from the Security Lists?
- A. The VCN where that compute instance resides still has a route rule.
- B. The VNIC of that compute instance is attached to a Network Security Group (NSG).
- C. The VNIC of that compute instance is attached to a Cluster Network.
- D. The VCN where that compute instance resides still has an Internet Gateway.
正解：B
質問 # 29
Which TWO statements are NOT correct regarding the Oracle Cloud Infrastructure (OCI) burstable instances?
- A. If the instance's average CPU utilization is below the baseline, it can burst above the baseline.
- B. Baseline utilization is a fraction of each CPU core.
- C. Burstable instances cost less than regular instances.
- D. Burstable instances are charged according to the baseline OCPU.
正解：C、D
解説：
The following statements about OCI burstable instances areNOT correct:
* A. Burstable instances cost less than regular instances:This is incorrect because burstable instances are not necessarily cheaper; the cost depends on the baseline utilization. While they allow for cost efficiency when running at a lower CPU baseline, they can become more expensive if frequently bursting above the baseline.
* B. Burstable instances are charged according to the baseline OCPU:This is incorrect because burstable instances are billed based on actual OCPU usage, which includes both baseline and burst usage. If an instance frequently operates above its baseline, the cost will reflect this higher usage.
Correct Concepts:
* C.Burstable instances can temporarily use more CPU than their baseline if the average CPU utilization is below the baseline.
* D.Baseline utilization is a fraction of each CPU core, which determines the level of consistent performance available without bursting.
References:
* Oracle Cloud Infrastructure Documentation:Burstable Instances
質問 # 30
Which is NOT a necessary step to complete this setup for instance principals?
- A. Create a dynamic group with matching rules to specify which instances can make API calls against services.
- B. Generate Auth Tokens to enable instances in the dynamic group to authenticate with APIs.
- C. Create a policy granting permissions to the dynamic group to access services in your compartment or tenancy.
- D. Deploy the application and the SDK to all the instances that belong to the dynamic group.
正解：B
質問 # 31
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