A company uses the ECS service of HUAWEI CLOUD. ECS instances are distributed in different VPCs in the same region. In order to facilitate the sharing of data between ECS instances, which of the following solutions are feasible? (Multiple choice)

• A.Use SFS Tubo file system. Through the VPC peer-to-peer connection function. Connect two or more VPCs in the network area to enable these VPCs to communicate with each other.
• B.Use OBS object storage to mount the OBS parallel file system to the Linux system through the obsfs tool.
• C.Use cloud hard disk EVS service
• D.Use elastic file service SFS. And configure multiple VPC access.

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If the bandwidth of the WAF purchased by the tenant is less than the actual business traffic. It may cause the tenant's business to be unavailable, stuck, or delayed for a certain period of time.

• A.True
• B.False

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The user's website is deployed on Huawei Cloud, and the public network ELB is used as a load balancer. Multiple ECS instances in the ELB back-end server group are configured with the same weight, but in fact the ECS instance loads are different. Which of the following is the most possible reason?

• A.HTTPS function is enabled on the website.
• B.The session retention function is turned on.
• C.The function of obtaining real IP is enabled.
• D.ECS instances are in different Region, network delays are different.

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What components can DBSS protect? (Multiple choice)

• A.MySQL
• B.LibrA/DWS
• C.MS-SQL
• D.PostgreSQL

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Flume is a distributed and highly available massive log aggregation system. Which of the following descriptions about Fume components is wrong?

• A.Source is used to load the data source to the Channel.
• B.Interceptor is used to filter and modify the collected data.
• C.Channel is the channel for temporarily buffering data.
• D.sink is used to remove data from the channel and put the data to the same destination.

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