As your business grows, you begin exceeding the maximum number of requests-per-minute supported by the Content Moderation API and requests begin to fail What is the best way to resolve this issue?

• A.Build a custom message queue solution which you can use to buffer requests and spread them out over time
• B.There is nothing you can do to reoslve this problem, except to make fewer requests.
• C.Open a ticket and ask for the API request limits to be raised
• D.Open a second Alibaba Cloud account, buy Content Moderation service under that account, and split your quests between these two accounts.

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Alibaba Cloud Anti-DDoS Premium can be used only when the origin site IP address is in Alibaba Cloud.

• A.False
• B.True

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If an ECS instance needs to be accessed by other applications from internet, a corresponding "port" must be enabled For example, HTTP applications work on port 80, while FTP applications work on port 21 If an administrator configures network security policies for this ECS instance, which of the following policies is the safest?

• A.After buying an ECS instance, the administrator immediately enables the security group firewall on the console and opens ports 0-1024 for public networks
• B.After buying an ECS instance, the administrator immediately enables the security group firewall on the console and opens all ports for public networks
• C.The administrator wants to build multiple applications on an ECS instance. For easy management, the administrator uses default settings and allows any IP address to access required service ports
• D.After buying an ECS instance, the administrator immediately enables the security group firewall on the console and opens only the required service ports for public networks

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