NIST (National Institute of Standards and Technology, National Institute of Standards and Technology) summarizes PaaS as an application-oriented core platform. From the perspective of function definition and core value, what features does PaaS have? (Multiple choice)

Which cloud service in the HUAWEI CLOUD HCS Online hybrid cloud solution can achieve cross-AZ-level disaster recovery, with RPO=0 and RTO<30min?

The bare metal container runs directly on Huawei high-performance physical server without any loss of virtualization performance and can achieve the same performance as the physical machine.

On the topological map of HUAWEI CLOUD application operation and maintenance, different colors represent the health of the instance, and the color is determined by the Apdex value.
If the instance color is gray, what does it represent?

Which of the following is the main function of VPC ENDPOINT?