What are the correct descriptions of the disaster recovery solutions for the two cities and three centers? Multiple selection
A.
When the production site fails, switch the primary and standby status of the database, and then modify the DNS authorization to 0% for the production site and 100% for the disaster recovery site
B.
Configurations, logs, snapshots, backups, etc. generated by production and disaster recovery centers are cross-region through VBS
C.
Service sharing between the two regions can be achieved through DNS, and the disaster recovery center only shares business in the event of a disaster
D.
When an AZ failure at the production site, the business system switches to another AZ, and the database is switched over as primary and standby as the database is switched
E.
Deploy RDS DB instances in the production and disaster recovery centers, and the database is 1:1:1 and the active and standby
Chosen Answer:
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