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1. Huawei Cloud ServiceStage provides industry-leading microservice solutions and a commercial version of the microservice engine, which can greatly simplify the development and launch of microservice applications. Which of the following microservice engines is not supported by ServiceStage?

A) Spring Cloud
B) Dubbo
C) ServiceComb Go Chassis
D) ServiceGomb Java Chassis

2. A company has deployed a public-facing forum through Huawei Cloud. In order to avoid Cc attacks on registered accounts, the company puts forward the following two requirements to forum administrators.
Requirement 1: Login protection, only 3 attempts to log in within five minutes are allowed, more than 3 times will prevent them from logging in again within 1 hour.
Requirement 2: Web search, a single user searches the page no more than 30 times in one minute, if it exceeds 30, the verification code will be verified.
In response to the above requirements, which features of DDOS can be used by tenants to complete the above requirements?

A) Requirement 1: (path, exact match /login. php) + (speed limit mode: IP speed limit) + (protection action: block)
B) Requirement 2: (path, prefix matching /search*) + (speed limit mode: user speed limit) + (protection action: man-machine verification)
C) Requirement 2: (path: exact match/ 1ogin.php) + (speed limit mode: IP speed limit) + (protection action, block)
D) Requirement 1: (path: prefix matching /search*) + (speed limit mode: user speed limit) + (protection action: man-machine verification)

3. Which of the following descriptions about Huawei Cloud ELB service is wrong?

A) The service capabilities of ELB have nothing to do with the back-end ECS public network specifications
B) ECS of the same operating system can be used as the back-end server of ELB service at the same time.
C) Adjust the number of back-end ECS at any time during the use of ELB.
D) The same group of ECS cannot build multiple websites and perform load balancing at the same time.

4. Huawei Cloud ELB can distribute user requests to multiple ECS instances according to different strategies. Which of the following descriptions about the "weighted round-robin mode" forwarding strategy is correct?

A) Distribute access requests in order according to the weight of the back-end elastic cloud server ECS instance.
B) Distribute the longest-waiting access request to the ECS instance with the strongest processing capability in the back-end elastic cloud server group.
C) Prioritize access requests with the highest priority to ECS instances of backend elastic cloud servers.
D) Distribute the access request to the ECS instance of the backend elastic cloud server with the lowest load currently.

5. PFX is a personal certificate saved in binary format. Generally appear in windows Server.
When a user wants to upload a certificate in this format to a Huawei ELB instance, which of the following operations is correct?

A) Elastic load balancing ELB supports certificates in PFx format. It can be uploaded directly.
B) The ELB load balance does not support certificates in PFx format. You can only convert them to P7B format first. Upload
C) ELB does not support certificates in PFX format. It can only be said to be converted into PEM format first. Upload again
D) ELB does not support certificates in PFX format. You can only convert them to DER format first. Upload again

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