Huawei H13-811_V3.5 - HCIA-Cloud Service V3.5

Option D is incorrect because improved response speed and website availability are fundamental objectives of CDN . Huawei's official CDN description explicitly characterizes CDN as a smart virtual network on Internet infrastructure that caches origin content at points of presence closer to users. This reduces transmission distance and accelerates access.

Huawei specifically states that CDN speeds up site response and improves site availability , while overcoming bottlenecks associated with low bandwidth, heavy user traffic, and uneven distribution of network nodes. Therefore, claiming that CDN cannot improve response speed or availability directly contradicts the documented purpose of the service.

Option A is essentially Huawei's own definition of CDN. Option B correctly describes major problems addressed by distributed content caching and request scheduling. Option C is also correct: content is cached or distributed to edge PoPs, and requests are scheduled to suitable nearby nodes. This reduces the requirement for every request to reach the original server.

CDN can additionally reduce origin-server workload and bandwidth consumption, which may improve origin infrastructure efficiency. However, that benefit exists alongside , not instead of, faster response and improved availability.

Accordingly, D is the only incorrect statement.

Reference topics: CDN Fundamentals; CDN PoPs; Website Acceleration; Content Distribution; Site Availability.

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The major CTS functions represented by the options are trace recording, trace query, and trace transfer , making A, B, and D correct.

Trace recording captures operations performed through the Huawei Cloud management console, through APIs, and operations initiated by supported cloud services. These records provide an audit trail containing information such as the operator, operation time, resource, operation result, and associated request data.

Trace query allows administrators and auditors to search recent operational records on the CTS console using criteria such as trace source, resource type, operator, trace status, and operation type. This is essential for security auditing, compliance investigation, and troubleshooting.

Trace transfer provides longer-term retention and centralized analysis. CTS can package operation records into trace files and transfer them to supported destinations such as OBS or LTS for preservation and subsequent processing.

Option C, OS monitoring , does not belong to CTS. Operating-system performance monitoring is primarily a Cloud Eye/server-monitoring capability rather than an audit-trace function.

Huawei's official CTS documentation expressly identifies recording, querying, and transfer among its core service functions.

Reference topics: Cloud Trace Service; Trace Recording; Trace Query; Trace Transfer; Cloud Auditing.

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Option C is incorrect under the HCIA-Cloud Service V3.5 networking model . Huawei Cloud's V3.5-era VPC documentation differentiates the two access-control mechanisms by their scope and rule behavior: security groups protect cloud server instances and use allow rules, whereas network ACLs protect subnets and support both allow and deny rules . Therefore, the statement that both mechanisms support both rule actions is inconsistent with the curriculum version used by this examination.

Option A is correct because a network ACL is associated with one or more subnets and controls traffic entering or leaving those subnets. Option D is also correct because security groups provide instance-level access control for resources such as ECSs. Huawei describes a security group as a collection of traffic-control rules applied to instances sharing common security requirements.

Option B is technically correct because these mechanisms can be layered. A security group provides access control around ECS instances, while a network ACL adds another security-control boundary around the subnet. Huawei specifically recommends using them together where comprehensive or fine-grained network protection is required.

Reference topics: Security Groups; Network ACLs; VPC Access Control; Defense-in-Depth.

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The statement is TRUE . Huawei Cloud Image Management Service supports creating private images from external image files, with OBS serving as the staging storage location for those files. The documented workflow is to prepare the source image, upload the image file to an appropriate OBS bucket, and then register or import that file through IMS as a private image.

Huawei's IMS documentation explicitly describes the scenario as registering an image file that has been uploaded to an OBS bucket as a private image . During image creation, the administrator selects Import Image or Image File as the source, selects the OBS bucket containing the prepared file, and then selects the required file.

Supported formats and detailed constraints depend on the image type and import method. For example, standard system-disk image imports and optimized fast-import workflows have specific requirements concerning image formats, file size, operating system, and bucket storage class. However, these restrictions do not change the fundamental integration represented in the question.

OBS therefore provides object storage for the source image file, while IMS performs image registration and lifecycle management. The resulting private image can subsequently be used to provision identically configured ECS instances.

Reference topics: Image Management Service; Creating Private Images; Importing Image Files; OBS and IMS Integration.

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The statement is TRUE . Logging is a fundamental component of cloud operation, maintenance, troubleshooting, security auditing, and lifecycle management. Huawei Cloud Log Tank Service is designed to collect and centrally process logs from a broad range of environments, including cloud services, ECSs, physical servers, containers, network-related systems, APIs, and other infrastructure components.

Huawei describes LTS as a platform for application O & M, security and compliance, and operations analysis . It provides full-stack log collection, high-speed searching, SQL analysis, visualization, alarm generation, processing, and log transfer. These capabilities allow administrators to track system behavior from deployment through normal operation, troubleshooting, scaling, upgrades, incident response, and eventual retirement.

Huawei's logging architecture also supports network-device information through protocols such as Syslog and SNMP, while ICAgent can collect logs from physical servers and ECSs. Cloud-service logs can be ingested directly from numerous Huawei Cloud services.

Logs therefore provide historical evidence and real-time operational insight throughout the lifecycle of infrastructure and applications. They are not limited to fault diagnosis after an incident; they are an integral O & M data source.

Reference topics: Log Management; LTS; Device O & M; Log Collection; Operational Analysis.

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Options A, B, and C are consistent with the fundamental characteristics and enabling technologies of cloud computing. Cloud platforms are designed to make resources elastic. Huawei Cloud Auto Scaling, for example, dynamically adds or removes ECS instances and adjusts related resources according to actual workload demand. Dynamic resource scaling is therefore a core practical capability of cloud computing.

On-demand deployment is also fundamental. Huawei Cloud's Cloud Adoption Framework explains that cloud resources can be provisioned, adjusted, and scaled rapidly without the traditional procurement and installation cycle associated with physical infrastructure. This allows organizations to create computing environments when needed and release them when demand decreases.

Virtualization is another important enabling technology. It allows physical computing resources to be abstracted, pooled, isolated, and efficiently shared among multiple workloads. Huawei Cloud specifically identifies virtualization and resource pooling as mechanisms that improve physical-resource utilization.

Option D is incorrect. A defining cloud characteristic is that the provider assumes responsibility for substantial portions of infrastructure construction and maintenance. The exact customer/provider boundary varies between IaaS, PaaS, and SaaS, but customers do not maintain all resources .

Reference topics: Cloud Computing Characteristics; Elasticity; On-Demand Provisioning; Virtualization; Shared Responsibility.

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Scalable File Service (SFS) is the precise Huawei Cloud service for this workload. The wording in the question closely follows Huawei's official media processing application scenario for SFS. Huawei specifically lists streaming media, archiving, editing, transcoding, content distribution, and video on demand as representative media-processing workloads.

The decisive requirement is that multiple hosts must access the same media files concurrently. SFS provides shared file storage that can be mounted by multiple ECSs or other supported compute resources through standard file protocols. Applications then interact with the storage through normal directories and file-system semantics. This eliminates the need to redesign media-processing applications around object-storage APIs.

OBS is highly scalable and well suited to object storage, content distribution, archive, and VOD data, but applications access OBS through HTTP/HTTPS, APIs, or SDKs rather than through a conventional shared filesystem. EVS provides block storage and generally must be attached to a server; ordinary EVS is not the direct multi-host shared file-system solution. Huawei's storage-selection guidance identifies SFS specifically for media processing and file sharing.

Therefore, B. SFS best satisfies the shared-media workflow.

Reference topics: Scalable File Service; Media Processing; Shared File Storage; Storage Service Selection.

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The statement is FALSE . Huawei Cloud explicitly supports using VPN to establish communication between VPCs deployed in different regions . The Huawei Cloud VPC FAQ describes this architecture directly: VPCs in the same region can be connected by VPC peering, while VPCs in different regions can establish connectivity through VPN. In the VPN design, each VPC uses a VPN gateway, and the two gateways establish an encrypted connection over the Internet. The VPC CIDR blocks are configured as the local and remote subnets.

This distinction is central to the HCIA V3.5 networking domain. VPC peering is region-scoped : two VPCs connected through a peering connection must reside in the same region. VPN, by contrast, can establish encrypted connectivity between geographically separated VPC networks. Huawei's VPN documentation specifies creating a VPN gateway for each VPC, creating VPN connections, configuring the peer gateway EIP, defining peer subnets, and applying matching cryptographic parameters.

Consequently, saying that Huawei Cloud VPN “does not support” cross-region VPC communications directly contradicts the supported VPN deployment model.

Reference topics: Virtual Private Network; Cross-Region VPC Connectivity; VPC Peering; VPN Gateways.

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