HUAWEI CLOUD ELB is a service that distributes traffic to multiple ECS instances and supports Layer 4 and Layer 7 forwarding protocols. When the seven-layer service is loaded, which of the following methods is mainly used to distribute traffic to ECS instances? (Multiple choice)

• A.Distribution strategies and rules set in ELB.
• B.Source IP address and port in the message
• C.The destination IP address and port in the message
• D.Really meaningful application layer content in the message

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Using HUAWEI CLOUD's dedicated cloud line, users can realize the interconnection and private network communication between the private network and the VPC. Which of the following scenarios can be interconnected through the cloud dedicated line? (Multiple choice)

• A.Under the same account, between two VPCs in the same Region.
• B.Under the same account, between two VPCs in the different Regions.
• C.Under different accounts, between two VPCs in the different Regions.
• D.Under different accounts, between two VPCs in the same Region.

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Which of the following scenarios are the Spark components in the Huawei Cloud MRS service applicable to? (Multiple choice)

• A.Data extraction, conversion and loading
• B.Machine learning
• C.Interactive analysis
• D.Data reuse scenarios

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A customer in the VPC in an ECS (bound EIP) on the deployment of the SNAT service for the entire VPC provides the ability to access the public network, for which the custom route adds a default route (destination address 0.0.0.0 /0), the next hop is the ECS with the SNAT service deployed. At this time, if you bind EIP to another ECS in the VPC, what will happen?

• A.The ECS can continue to be deployed by the SNAT services ECS access the public network.
• B.The ECS can access the public network, but it cannot be determined by SMAT service or EIP access.
• C.The ECS can't access the public network because of the clutter in the routing.
• D.The ECS can access the public network through the bound EIP.

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A user to use Huawei's cloud ECS services, and for each ECS instance is assigned a data disk, due to the increase in business volume. Data emergency disk capacity, disk data capacity is needed now, which of the following operations are correct? (Multiple choice)

• A.On the ECS instance where the Windows system is installed, expand the D disk through the disk management " extended volume ".
• B.On the ECS instance where the Windows system is installed, expand the D drive through the disk management " new simple volume ".
• C.On the ecS instance where the Cento7.4 system is installed and the kernel version is higher than 3.6.0, the irane file is regenerated through the dreut -f command, and then the disk partition is expanded through the isze28 disk partition command.
• D.On the BCS instance where the centos 7.4 system is installed and the kernel version is higher than 3.6.0, the rompart disk partition command is used to expand the capacity, and then the disk partition is expanded through the esizefs disk partition command.

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