What services are reachable from all nodes and must be included in every ECS data center?

Which ECS feature is used to protect and share objects for global access?

Which type of data service is provided by ECS?

An ECS software installation with network separation has been successfully completed. The network team has just realized that public IP addresses are incorrectly assigned to ECS and must be changed.
What should be done to address this issue?

An organization needs to isolate each business unit from the other such that each unit has its own user management, replication configuration, and encryption policy. What should the organization create on the ECS?