It is often used to describe a system that has been specifically designed to reduce downtime and ensure high availability of services. RDS has functions such as automatic single point switchover and automatic database backup to ensure high availability and data security of RDS instances.
Public network IP
It is a public network access method, that is, the IP on the Internet obtained by a computer, and computers connected to the public network can access each other at will through this address. Public IP is the only one in the world.