The four deployment models of mainstream cloud computing are: public cloud, community cloud, private cloud and ().

Which of the following descriptions about Huawei Cloud database MySQL is correct? (Multiple choice)

Security is the basis of architecture design. Designing a secure architecture can minimize the risk of system intrusion and ensure business operation.
Which of the following is not a high-security architecture design purpose?

A user's website is deployed on Huawei Cloud, and the public network ELB is used as the load balancer. Multiple ECS instances in the ELB backend server group are configured with the same weight, but the actual ECS instance loads are different.
Which of the following is the most likely cause?

Compared with non-relational databases, relational databases use semi-structured datasets to store data, while non-relational databases use structured tables to store data.