Pass the Huawei HCIA-Cloud Service H13-811_V3.5 Questions and answers with Dumpstech

The statement is TRUE, with an important implementation distinction. Huawei Cloud extended network interfaces provide flexible networking independently of the ECS primary network interface. An extended network interface can be associated with security groups that differ from those associated with the ECS's other interfaces. Huawei Cloud explicitly states that an extended network interface created through the console can be attached to an instance in the same VPC while using different security groups.

Huawei documentation additionally specifies that when an extended network interface is created through the appropriate API, it can be attached to an instance residing in a different VPC. Therefore, the broader proposition in the question—that an ECS and an extended interface can belong to different VPCs or security groups—is technically supported by Huawei Cloud.

For conventional console-based deployments, the normal architecture places the ECS's primary and extended interfaces in different subnets of the same VPC, with security rules independently assignable to individual interfaces. This provides traffic separation for service, management, internal, and external networks. The API capability extends this flexibility further.

Consequently, because Huawei officially supports both differentiated security-group association and cross-VPC attachment under the documented API scenario, the correct answer is TRUE.

Reference topics: Elastic Network Interfaces; Extension NICs; VPC Networking; Security Group Association.

===============

Option A is correct . Huawei Cloud Elastic Load Balance provides several traffic-distribution algorithms, including weighted round robin, weighted least connections, and source IP hash for shared load balancers. When backend servers have equal weights under weighted round robin, they receive an equal proportion of requests, providing the even traffic distribution described in the question.

Auto Scaling and ELB are explicitly integrated. When an AS group is associated with a load balancer, Huawei Cloud automatically associates newly added ECS instances with the load balancer and removes the association when instances leave the AS group. Therefore, option C is false; administrators do not need to manually register each dynamically created instance one by one.

Option B is incorrect in this context because the load balancer and its AS resources operate within the applicable regional/VPC deployment architecture; a standard shared ELB is not a mechanism for arbitrary cross-region backend distribution. Option D is also false because detecting unhealthy instances depends upon an enabled health-check mechanism. Disabling health checking removes the basis for making that health determination.

Reference topics: Elastic Load Balance; Auto Scaling and ELB Integration; Backend Servers; Load Balancing Algorithms.

===============

All four operations are supported management actions for Huawei Cloud RDS instances, subject to the applicable database engine, instance type, current status, and other service constraints.

Changing the failover priority is supported for primary/standby RDS deployments. Huawei allows administrators to prioritize either Reliability , which emphasizes data consistency, or Availability , which emphasizes service continuity during failover.

Deleting a DB instance is a standard lifecycle-management operation available to appropriately authorized users. Huawei's RDS permission model includes the rds:instance:delete action for this purpose.

Scaling up storage space is likewise an established RDS modification operation. Administrators can increase allocated storage when database capacity requirements grow, and supported database engines can also provide storage autoscaling options.

Finally, rebooting a DB instance is a supported administrative action used when configuration changes, troubleshooting, or other operational circumstances require an instance restart. Huawei's CTS integration explicitly identifies both scaling storage and restarting an instance as auditable RDS operations.

Huawei's RDS API catalog lists deleting, scaling storage, rebooting, and changing failover priority as supported instance-management operations.

Reference topics: RDS Instance Management; Failover Priority; Storage Scaling; DB Instance Reboot; DB Instance Deletion.

Options B, C, and D identify problems that CDN architecture is designed to mitigate. Huawei defines CDN as an intelligent virtual network built on Internet infrastructure that caches origin content on geographically distributed points of presence close to users. This substantially shortens the network path between users and frequently requested resources.

Consequently, CDN improves download speed because users can retrieve cached files from a nearby edge PoP rather than repeatedly crossing long-distance networks to the origin server. It also addresses slow website access by accelerating static content delivery, reducing latency, and improving site response and availability. Huawei specifically states that CDN breaks through bottlenecks associated with limited bandwidth, high access traffic, and uneven network-node distribution.

Caching popular content at edge nodes also reduces repeated traffic flowing through core and backbone networks. This alleviates bandwidth pressure on both the origin infrastructure and long-distance network paths.

Option A is not a CDN problem statement. CDN commonly reduces origin-server load , meaning utilization of origin resources may decrease rather than fixing a problem described as “low server utilization.” Its purpose is acceleration and traffic offloading, not increasing server utilization.

Therefore, B, C, and D are correct.

Reference topics: Content Delivery Network; Edge Caching; Website Acceleration; Download Acceleration; Origin Traffic Reduction.

===============

The statement is TRUE. Huawei Cloud OBS provides several resource-based authorization mechanisms, including bucket policies and object policies. Their principal distinction is the scope of resources to which they apply.

Huawei's official OBS Permission Configuration Guide explicitly states that an object policy applies to only one object in a bucket, whereas a bucket policy applies to multiple objects or all objects within the bucket. This enables administrators to select the authorization mechanism that best matches the required granularity.

An object policy is useful when permissions must be configured specifically for an individual object, such as granting another principal read or write permissions to one particular resource without broadening access to the rest of the bucket.

A bucket policy supports broader authorization scenarios. Its policy statements can define principals, actions, resources, effects, and conditions to grant or restrict access to selected objects, prefixes, or the entire bucket. Typical uses include allowing another Huawei Cloud account to access specified OBS resources or granting IAM identities access to defined bucket content.

The question therefore correctly distinguishes object-level policy scope from bucket-level multi-object policy scope.

Reference topics: OBS Permission Management; Object Policies; Bucket Policies; Resource-Based Authorization.

===============

Option A is incorrect because Huawei Cloud Auto Scaling is designed to automatically adjust ECS instances and bandwidth resources , not Bare Metal Server instances. Huawei's AS documentation defines an AS group as a collection of ECS instances and states that scaling actions add or remove ECS instances according to alarm, scheduled, or periodic policies. BMS provides dedicated physical compute and is provisioned through the BMS service rather than being dynamically created and destroyed by an ECS Auto Scaling group.

The other relationships are valid. Cloud Eye supports BMS operating-system monitoring after the Cloud Eye Agent is installed; the BMS reports detailed CPU, memory, disk, and network metrics to Cloud Eye. EVS is integrated with BMS and additional supported EVS data disks can be attached when more storage is required. IMS is likewise an integral BMS service: images can be used to create consistently configured BMSs and to reinstall or change their operating systems, reducing repetitive deployment work. Huawei's BMS architecture explicitly lists VPC, IMS, EVS, Cloud Eye, and backup services as integrations supporting BMS operation.

Reference topics: Bare Metal Server Architecture; BMS and Other Cloud Services; Auto Scaling; Cloud Eye; IMS; EVS.

===============

Option A is the only sequence that respects the essential dependency chain for Huawei Cloud Log Tank Service host-log collection. A log group must exist before its log stream can be created , because a log stream is a subordinate storage and management unit within a log group. Huawei explicitly describes log groups and streams as the basic units used to manage logs and requires creation of the group before creation of its contained stream.

ICAgent is the host-side log collection component. It must be installed on the ECS before LTS can collect host log files according to configured paths and rules. After ICAgent is operational and the destination log stream exists, the administrator configures the relevant collection paths, parsing/collection rules, and ingestion configuration. ICAgent then packages and reports matching log records into the selected log stream.

Only after ingestion has been configured can the administrator reliably access LTS and view the collected logs for searching, analysis, monitoring, troubleshooting, or O & M.

The other alternatives violate basic dependencies by attempting to create a stream before its parent group, configuring collection before the required destination/agent exists, or installing ICAgent after collection configuration.

Reference topics: Log Tank Service; Log Groups; Log Streams; ICAgent; ECS Log Collection.

===============

For the HCIA-Cloud Service V3.5 curriculum version , statements A, B, and C are correct . An ECS must be associated with a security group so that inbound and outbound network access can be controlled. If an account has no custom group, Huawei Cloud provides a default security group, and users can either use that default group or create and select another security group that matches the workload's security requirements.

The V3.5-era Huawei Cloud VPC documentation distinguishes security groups from network ACLs by stating that security groups provide allow rules , whereas network ACLs provide both allow and deny rules. This distinction is important because it appears repeatedly in the HCIA V3.5 networking curriculum.

Statement D is false. Huawei Cloud specifically permits administrators to modify existing rules or add rules to the default security group . The default group itself cannot normally be deleted, but that restriction does not make its inbound or outbound rules immutable. Huawei's default-security-group documentation explicitly distinguishes group deletion restrictions from rule modification permissions.

Reference topics: VPC Security Groups; ECS Network Configuration; Default Security Group; Security Group Rules.

===============

Option A specifically describes Huawei Cloud's dynamic resource adjustment mode . In Huawei Auto Scaling, dynamic scaling uses an alarm policy that evaluates real-time monitoring metrics such as CPU utilization. When the configured alarm condition is reached, AS automatically performs a scaling action to increase or decrease resources so that capacity follows unpredictable workload changes.

Option B is incorrect because triggering an AS policy does not automatically redefine the configured maximum number of instances . The maximum is an upper boundary for the AS group. A scaling policy changes the expected number of instances, adds or removes instances, or sets the instance count to a configured value while remaining within the minimum and maximum boundaries.

Option C correctly describes planned scaling , but the question specifically asks about dynamic resource scaling. Huawei classifies scheduled and periodic policies as planned adjustment mechanisms suitable for workloads that change predictably according to a schedule.

Option D is incorrect because alarm-triggered scaling is subject to a cooldown period . During that period, Huawei Cloud rejects additional scaling requests generated by alarm policies to prevent repeated unnecessary scaling operations.

Therefore, for dynamic resource scaling, A is the correct answer .

Reference topics: Auto Scaling; Dynamic Resource Adjustment; Alarm Policies; Planned Scaling; Cooldown Period.

Statement C is incorrect because container images do not require a private registry. Huawei Cloud container services can consume images from multiple sources, including Huawei Cloud SoftWare Repository for Container (SWR), public repositories, shared repositories, and supported third-party image repositories. Huawei Cloud CCI documentation explicitly states that containers can pull both SWR images and third-party images .

A container image is a standardized, executable package containing the files and configuration required for a containerized application. Huawei describes it as containing the application and required supporting components such as environments, libraries, configuration files, and file systems. This supports option A.

Option B is consistent with the container-image concept because images can contain a base operating-system environment or filesystem together with application dependencies and configuration required by the application.

Option D is also valid. An image acts as an immutable deployment template: once constructed, the same image can be instantiated repeatedly as containers, enabling applications to run with a consistent packaged environment rather than requiring the software stack to be manually reconfigured for every deployment.

A private registry is useful for controlling proprietary enterprise images, but it is an architectural choice—not a mandatory requirement. Therefore, C is the incorrect statement.

Reference topics: Container Images; SWR; Container Registries; CCI Image Sources; Containerized Application Deployment.

===============