After a customer uses Alibaba Cloud Anti-DDoS Premium Service, a 502 error is prompted. Which of the followings are the possible causes of the error? (Number of correct answers 3)

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

Anti-DDoS Premium Service is a value-added service intended to address the problem of service interruption caused by DDoS attack to servers

including non-Alibaba Cloud hosts)

Users can configure a protected IP address so that the attack traffic can be redirected to this IP address, thereby ensuring the stability and reliability of the origin site. When a user configures Anti-DDoS Premium Service and imports an HTTPS certificate, the system prompts an " incorrect parameter format " error Which of the following is NOT the reason of this error?

Alibaba Cloud Data Risk Control utilizes Alibaba Group's Big Data computing capabilities and

industry-leading, risk decision making engine to address fraud threats in key service processes (such

as account log on, online activity, payment) and avoid financial loss

Which of the following is NOT an application scenario of Data Risk Control?

You have set an alert policy for the disk usage of an ECS instance by using Alibaba Cloud

CloudMonitor Each measurement cycle lasts for 5 minutes, during which the average disk usage is

measured If the average disk usage exceeds 80% for five consecutive measurement cycles, an alert

will be reported After your average disk usage exceeds 80%, how long will it take to receive an alert

with the best case scenario?