Regarding the description of security groups and network ACLs, which of the following statements is wrong?

• A.Security groups are mandatory features for ECS, and network ACLs are optional features
• B.The security group supports 3-tuple filtering, and the network ACL supports 5-tuple filtering
• C.ECS communication in the same subnet can use both security group protection and network ACL
• D.The security group provides ECS level protection, and the network ACL provides subnet level protection

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What are the advantages of DWS's new data warehouse program? (Multiple choice)

• A.Quick deployment, easy to use
• B.Distributed architecture, transparent data segmentation
• C.Compatible with standard SQL 2003, easy to develop and dock applications
• D.Rich ecology, compatible with a variety of BI products

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What challenges will the microservices architecture face?

• A.Distributed systems. High complexity
• B.Partitioned database architecture. Data consistency is difficult to guarantee
• C.Function involves multiple modules. It is not convenient to test
• D.The inevitable extension of the delivery cycle

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Using the Huawei Cloud FunctioGraph service, if the function is not called, no billing information will be generated.

• A.True
• B.False

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Which of the following ways does RDS not support the client to connect to the database instance in?

• A.Public IP
• B.Intranet IP
• C.Domain name
• D.Host name

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