If the database instance of a Huawei Cloud tenant is under an unknown attack, which of the following methods is recommended for the tenant administrator to complete the creation of the database firewall policy?

• A.Learning mode
• B.Database firewall
• C.Cannot automatically create security policies for existing attacks.
• D.Risk-based IPS/IDS

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Regarding the HUAWEI CLOUD cloud connection service, which of the following descriptions is correct?

• A.VPN can completely replace cloud connection.
• B.The cloud dedicated line has the same function as the cloud connection.
• C.It is not possible to achieve mutual visits between VPCs in the same Region.
• D.Able to achieve mutual visits between different Region VPCs.

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Which of the following are typical application scenarios of the ServiceStage microservice solution?

• A.Microservice development and management
• B.Rapid development and deployment of web applications
• C.Continuous integration and continuous delivery
• D.Gray release

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In the basic development of microservices, when the consumer calls the provider service and reports an error, the exception message is that the provider service cannot be found. What are the possible reasons? (Multiple choice)

• A.The environment of consumer service and provi der service is different.
• B.There is no instance record of provi der service in the service center.
• C.The PPLCATION ID of consumer service and provi der are different.
• D.The service center has no record of provider service.

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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.Really meaningful application layer content in the message
• C.The destination IP address and port in the message
• D.Source IP address and port in the message

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