Question No : 1
Alibaba Cloud Elastic Compute Service (ECS) instances in different Security Groups will definitely have no way to communicate with each other.

• A.True
• B.False

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Question No : 2
If an administrator often needs to manage multiple ECS instances in an Alibaba Cloud VPC through the Internet.
Which of the following solutions can meet this need at low costs and without affecting system security.

• A.None of these answers are correct.
• B.Choose an ECS instance from VPC and make it as the bastion host And then, apply an EIP and bind it to this ECS instance. After that the administrator can manage other ECS instances through this bastion host.
• C.Modify the VPC Security Group policy, to allow access from the Internet.
• D.Bind an EIP to each of the ECS instances, and Jog on to each of these ECS instances to manage them.

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Question No : 3
Once ECS is created, you can't change its private IP address anymore.

• A.True
• B.False

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Question No : 4
Company A constructed a sales management platform using three Elastic Compute Service (ECS) instances. One of the instances runs MySQL, and is used as the database server. The other two instances are used as Web servers After some time, the number of employees in Company A dramatically increases, leading to higher sales volumes At the same time, the platform response speed is gradually decreasing too.
According to the report from CloudMonitor, the average CPU utilization rate of the two Web servers exceeds 70%, and database load reaches 75% Company A can select Alibaba Cloud_________ services.to cope with the issue and optimize the performance. (Number of correct answers: 2)

• A.Import database data into Object Storage Service (OSS) to share the storage pressure on the platform
• B.Incorporate Server Load Balancer (SLB) and add additional ECS instances to relieve the load on existing ECS instances
• C.Use Content Delivery Network (CDN) to enhance content loading speed
• D.Replace the self-built MySQL database with ApsaraDB for RDS to obtain better database performance, and utilize RDS read-only instances to handle read-only requests

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