CCS API → Provide the service logic of CCS tagging

CCS Console → Provide administrators with visualized CCS tagging

CCS Client → Provide administrators with cloud service tagging using CCS command lines

Comprehensive and Detailed 150 to 200 words of Explanation From HUAWEI CLOUD Computing Topics:

This drag-and-drop match follows the normal architectural roles of Huawei Cloud Stack CCS components. The CCS API is the backend service interface, so it is responsible for the service logic of CCS tagging . In cloud platforms, APIs handle request processing, tag creation, tag query, and tag-management actions exposed to other components or clients. The CCS Console is the graphical management interface, so its role is to provide administrators with visualized CCS tagging . This means administrators can perform tag-related operations through a web-based UI rather than command lines. The CCS Client is the command-line access component, so it is used to provide administrators with cloud service tagging using CCS command lines .

This mapping is also consistent with standard Huawei Cloud Stack component design principles: API for backend logic , Console for visual management , and Client for CLI-based operations . In practical cloud O & M and resource governance, these three components complement each other by supporting programmatic integration, web-based administration, and command-line automation. Therefore, the verified matching is: CCS API → service logic , CCS Console → visualized tagging , and CCS Client → command-line tagging .

The correct answer is C. SaaS. In the Software as a Service model, the cloud provider delivers a complete application that users access over the network, while the provider is responsible for installation, maintenance, upgrades, and much of the operational management. This makes SaaS especially suitable for daily office work, such as email, document collaboration, office suites, and business productivity applications. Organizations, especially small- and medium-sized enterprises, can use the software directly without managing the underlying infrastructure or platform.

By comparison, IaaS mainly provides infrastructure resources such as compute, storage, and networking, so the enterprise still needs to manage operating systems and applications. PaaS provides an application development and runtime platform, which is useful for developers but not the best fit for general office users. MaaS is not the standard answer in this classic cloud-service-model classification.

In Huawei Cloud computing training and in mainstream cloud architecture, SaaS is the service model that best matches a scenario where customers want to use software immediately and avoid the burden of software deployment and maintenance. Therefore, the verified answer is C. SaaS.

Horizon is the web-based dashboard for OpenStack, designed to provide a consistent graphical interface for managing cloud resources. In practice, Horizon focuses on presenting a consistent view of services to users and administrators, and OpenStack components commonly maintain API backward compatibility to support upgrades and continued interoperability. OpenStack documentation also shows that Horizon can be used in larger and multi-region environments, which supports the idea that scalability is relevant to its operational value.

However, API eventual consistency is not a Horizon value proposition. “Eventual consistency” is a concept found in distributed storage systems such as OpenStack Swift/Object Storage, where updates may take time to become visible everywhere. OpenStack documentation explicitly uses this term in the context of Object Storage behavior, not Horizon dashboard design. Because Horizon is a management dashboard rather than a distributed storage consistency model, API eventual consistency does not belong as one of its core value propositions. Therefore, the correct answer is A . This is the best-supported conclusion from official OpenStack documentation and aligns with Huawei Cloud training-style OpenStack topic coverage.

The correct answer is C. Tenant application response time . Huawei’s comprehensive monitoring documentation states that service monitoring tests the health of the current application and locates application exceptions based on monitoring metrics such as response time and availability . That directly matches the scenario of monitoring tenant application response time .

The other options belong to different monitoring domains. Health status of the physical server power supply is hardware or infrastructure monitoring, not service monitoring. Virtual network congestion is a network-layer performance issue rather than an application service-monitoring scenario. Latency of the distributed tracing system is closer to tracing or APM platform internals than to the application service-monitoring scenario explicitly described in Huawei’s cited service-monitoring definition. Huawei’s wording focuses on the monitored application’s health, response time, and availability, not hardware power modules or tracing-platform latency.

Therefore, based on Huawei’s official description of comprehensive service monitoring , the scenario clearly covered is tenant application response time , making the verified answer C .

The correct answer is B (FALSE) . Huawei documentation supports the first part of the statement: Combined API is described as providing the service backend for services such as ECS, BMS, IMS, and EVS , and Huawei usage materials show console requests being forwarded through the UI to Combined API for backend processing. That means it does function as a backend service layer between the console and underlying cloud services.

However, the statement becomes incorrect when it says Combined API must be deployed in the Global zone . Huawei architecture documentation explains that Huawei Cloud Stack includes both a global zone and regional deployment structure , and not all components belong to the global zone. Huawei snippets describing global-region deployment list typical global-zone components such as ManageOne and the cloud service console , while Combined API is described separately as a service backend in the broader architecture of the region/global deployment model. This supports the conclusion that Combined API is not simply a mandatory global-zone-only component .

So the backend-function part is true, but the deployment claim is not. Therefore, the overall statement is FALSE .

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The correct answer is C. show . Official OpenStack command-line documentation explicitly lists the command openstack server show < server > and explains that it is used to show server details . The same documentation states that the < server > argument represents the server name or ID , which matches the wording in your question exactly.

The other options are not correct in this context. openstack server list displays a list of servers rather than the details of one specific instance. query and conf are not valid standard subcommands for this OpenStack server-detail operation. Since HUAWEI CLOUD Stack operations in this area follow OpenStack command syntax for instance inspection and lifecycle management, the proper command for viewing one instance’s details is openstack server show < server > .

Therefore, after correcting the sentence format, the blank should be filled with show , and the full verified command is openstack server show < server > . That makes the correct answer C .

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The correct answer is D . Huawei’s official HUAWEI CLOUD Stack NAT Gateway documentation explains that DNAT is used to map the private IP address and port of a cloud server in a VPC to a public IP address and port by binding an EIP. In practical terms, DNAT allows requests that arrive at a public IP address to be forwarded to the private IP address of a server inside the cloud network. That matches option D exactly.

Option A describes SNAT , not DNAT. Huawei explicitly states that SNAT translates a private IP address into an extranet/public IP address so cloud servers can access the Internet. Option B is also related to SNAT behavior, because Huawei notes that multiple cloud servers in a VPC can share an EIP for outbound Internet access through SNAT. Option C describes a filtering or firewall-style function rather than NAT translation.

Therefore, in Huawei Cloud Stack networking, DNAT is specifically used for inbound mapping from public addresses to private cloud-server addresses , so the verified answer is D .

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The correct answer is B. Managing the services or resources of branches across regions . In HUAWEI CLOUD Stack, resource sets are primarily used as an internal organizational and authorization tool within a tenant or VDC . They are well suited for grouping resources by department , project , or environment , such as production versus test resources. This means options A , C , and D are all typical and appropriate use cases because they involve structuring and controlling resources inside the same logical management domain. ( )

By contrast, managing services or resources of branches across regions is broader than the normal scope of a resource set. Cross-region branch management usually involves higher-level multi-region organizational constructs, regional administration, or broader tenant/VDC design rather than simply creating a resource set. Resource sets help refine governance inside an established tenant structure; they are not the main mechanism for organizing geographically distributed branch operations across regions.

So after correcting the wording, the scenario that is not suitable for resource sets is B , because it describes a cross-region management requirement that typically belongs to a higher-level cloud planning and governance model rather than a resource-set grouping function. Therefore, the verified answer is B .