A Customer Production Center Is in Chengdu with a Disaster

A customer production center is in Chengdu with a disaster recovery center in Shenzhen, using VIS 6600T remote replication capabilities to meet the remote disaster recovery. Which of the following about the VIS6600T copy function is correct?

A) DCM (data change map) is mainly used to ensure that the data in the production center is copied to the disaster recovery center according to the order sent by the host to ensure the data consistency
B) Production, disaster recovery data volume and disaster recovery must be consistent, the name can be inconsistent
C) Each business configuration a copy volume group, multiple copy volume group can use the same virtual IP
D) virtual IP and physical IP must be in the same network segment