H13-811_V3.5 Exam Questions & Answers

Statements B and C are false. Huawei Cloud distinguishes alarm-based, scheduled, and periodic Auto Scaling policies. An alarm policy triggers a scaling operation in response to monitored metrics such as CPU utilization. Scaling ''every three hours'' is time-interval behavior and therefore belongs to a periodic policy, not an alarm policy. This makes B incorrect.

Statement C is also incorrect. The expected number of instances is the desired number of ECS instances that should currently run within an AS group. Huawei specifies that this value must remain between the configured minimum and maximum instance counts. It can be modified manually or changed through scheduled, periodic, or alarm-based policies. It is not synonymous with the minimum instance count during peak hours.

Statement A is valid because an AS configuration can use a Huawei Cloud public image; Huawei's AS configuration parameters explicitly support public, private, and shared images.

Statement D is also valid. Huawei specifies that when an existing ECS is manually added to an AS group, the ECS must not already be a member of another AS group.

Consequently, the two false statements are B and C.

Reference topics: Auto Scaling Configurations; AS Policies; Expected Instances; AS Groups.

Correct Answer: Virtual Private Cloud (VPC)

VPC is the foundational networking service that provides isolated network environments with customizable IP address ranges, subnets, and network access control. It allows organizations to define private network topologies in the cloud, which is essential for migrating on-premises applications.

Why other options are incorrect:

• Elastic IP (EIP) - This service provides static public IP addresses for instances, not the foundational network infrastructure.
• Elastic Load Balance (ELB) - This is a load balancing service for distributing traffic, not a networking foundation.
• NAT Gateway - This service enables private instances to communicate with external networks, but it is not the foundational network service.

Correct Answer: Content Delivery Network (CDN)

CDN caches content on geographically distributed edge nodes closer to end-users, significantly reducing latency and accelerating content delivery. When integrated with Object Storage Service, CDN retrieves content from the origin and caches it at edge locations, serving subsequent requests from the nearest edge node. This dramatically improves performance for globally distributed users.

Why the other options are incorrect:

Elastic Load Balance (ELB) distributes traffic across multiple resources within a region, not globally. Virtual Private Network (VPN) provides encrypted connectivity between networks, not content acceleration. NAT Gateway provides network address translation for outbound traffic, unrelated to content delivery optimization.

Memory-optimized ECSs are specifically designed for the workload described. Huawei Cloud defines memory-optimized ECSs as instances that excel at processing large in-memory datasets and high-throughput networking. They are intended for memory-intensive workloads involving large datasets, frequent or heavy data access, and requirements for rapid data processing and exchange.

The scenario deliberately combines several identifying characteristics: large-memory datasets, substantial data volumes, high numbers of access requests, demanding network performance, and rapid data transfer and processing. These characteristics correspond directly to the design profile of the memory-optimized ECS family. Huawei lists representative applications such as high-performance databases, in-memory databases, distributed memory caches, data analysis and mining, Hadoop, Spark, e-commerce, and other enterprise applications.

Ultra-high I/O instances emphasize extremely high storage IOPS and low disk latency. High-performance computing instances are optimized primarily for compute-intensive scientific or engineering workloads. Although ''large-memory'' may appear plausible, memory-optimized is the ECS category whose official description explicitly combines large in-memory datasets with high-throughput networking and heavy data access.

Therefore, D is the precise Huawei Cloud classification required by the scenario.

Reference topics: ECS Types and Specifications; Memory-Optimized ECSs; Memory-Intensive Workloads; High-Throughput Networking.

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.