H13-821-V3-5Preview

Security in architecture design typically refers to the ability of a product or service to remain operational or executable under specified conditions and within a defined timeframe. This attribute reflects both the availability and maintainability of the product.

What is not a major factor driving enterprises to migrate to the cloud?

High availability is an important design feature. Which of the following is not related to high availability?

A customer purchased compute-intensive Elastic Cloud Servers (ECSs) and deployed Linux applications to test services. The ECSs are billed on a pay-per-use basis. When there are no tests being conducted, some ECSs are stopped to save costs. After ECSs are stopped, which of the following resources are not billed? (Choose all that apply.)

To process high-quality images and videos as well as big data analytics, memory-optimized Elastic Cloud Servers (ECSs) are recommended, such as M8, M7, and M5 ECSs.

A user purchased an Elastic Cloud Server (ECS) with the c6s.6xlarge.2 flavor on Huawei Cloud. Which of the following statements about this ECS flavor are true? (Choose all that apply.)

A customer purchased a general computing-plus Elastic Cloud Server (ECS) with the c9.xlarge.2 flavor on Huawei Cloud. This means the ECS has 4 vCPUs and 16 GiB of memory.

Which of the following statements are true about how databases are classified? (Choose all that apply.)

After read replicas are created, they can handle read-intensive workloads for the primary instance, reducing its load. Which of the following statements are true about high-availability (HA) read replicas? (Choose all that apply.)

A cloud connection enables an on-premises data center to access VPCs in multiple regions so users can use a single physical connection to provide high-speed access to cloud compute and storage resources in any region.

Elastic Load Balance (ELB) provides dedicated and shared load balancers. Which of the following statements about shared load balancers are false? (Choose all that apply.)

DNAT rules enable servers in a VPC to provide services accessible from the Internet. DNAT allows users to bind an EIP to a public NAT gateway and supports IP address mapping and port mapping. After receiving requests from a specific port over a specific protocol, the public NAT gateway can forward the requests to a specific port of the target server through port mapping. Users can also configure an EIP for a server. Then the public NAT gateway can forward all requests destined for the EIP to a specific server through IP address mapping. In this way, multiple servers can share the same EIP and bandwidth, which reduces bandwidth costs.

A company wants to use Virtual Private Network (VPN) to enable communications between its on-premises data center and multiple VPCs on Huawei Cloud. Which of the following statements about VPN is false?

Each EIP can be bound to only one cloud resource at a time, and the EIP and the resource must be in the same region.

Both Cloud Connect and Direct Connect can be used to establish high-speed low-latency networks. Which of the following statements about the differences between them is false?

After a company’s workloads are migrated to the cloud, multiple cloud servers in a virtual private cloud (VPC) require Internet access. However, the EIPs bound to the cloud servers may be attacked. An engineer proposes adding multiple EIPs when configuring DNAT rules. If one EIP is attacked, other EIPs can continue providing services and keep operations running normally.

Scalable File Service (SFS) supports general-purpose file systems, which can provide users with scalable, high-performance file storage. Which of the following statements about general-purpose file systems are true? (Choose all that apply.)

After a user attaches a newly created data disk to an Elastic Cloud Server (ECS), the user needs to initialize the Elastic Volume Service (EVS) disk, including creating partitions and file systems and mounting the partitions, before the disk can be used. Which of the following statements about disk initialization is false?

Parallel File System (PFS) is a high-performance file system of OBS. In a parallel file system, each directory level in the access path is treated as an independent file. For example, in the path “/dir01/dir02/example.txt”, “/dir0l/”, “/dir01/dir02/”, and “/dir01/dir02/example.txt” are all objects simulated using files. These are special file representations within object storage.

A small and micro enterprise plans to use Huawei Cloud Elastic Cloud Server (ECS) to deploy a small web-based forum for technical and experience exchange and enterprise publicity. The enterprise hopes that data is stored separately from ECSs and supports independent access. Which of the following storage services are recommended as cost-effective options? (Choose all that apply.)

Elastic Volume Service (EVS) comes with a variety of disk types. They are suitable for different workloads. Which of the following statements about EVS disk types and their use cases are false? (Choose all that apply.)

The “black hole” used by Anti-DDoS indicates that a server or ECS is being attacked with more traffic than basic defense can handle. If this threshold is exceeded, the platform enables the black hole access and diverts the attack traffic to the black hole for traffic scrubbing.