How does the elastic cloud server construct a logically completely isolated network area?

The two sites communicate across the Internet, and IP can be deployed on the firewalls at both ends Sec VPN thus protects the mutual access traffic between the two intranets.

Cloud Monitoring, What alarm status does Cloud Monitoring currently support?

load balancer can be used alone

Elastic Cloud Server is bound()Rear. Can be through the fixed public network IP The address provides external access.