Which data protection technology provides the highest degree of protection against logical
corruption and a near-zero RPO?

A.
CDP

B.
Mirroring

C.
Backup-to-disk

D.
Snapshots with CoFW

Explanation:
Continuous Data Protection
In network-based replication, the replication occurs at the network layer between the hosts and
storage arrays. Network-based replication combines the benefits of array-based and host-based
replications. By offloading replication from servers and arrays, network-based replication can work
across a large number of server platforms and storage arrays, making it ideal for highly
heterogeneous environments. Continuous data protection (CDP) is a technology used for networkbased local and remote replications.
In a data center environment, mission-critical applications often require instant and unlimited data
recovery points. Traditional data protection technologies offer limited recovery points. If data loss
occurs, the system can be rolled back only to the last available recovery point. Mirroring offers
continuous replication; however, if logical corruption occurs to the production data, the error might
propagate to the mirror, which makes the replica unusable. In normal operation, CDP provides the
ability to restore data to any previous PIT. It enables this capability by tracking all the changes to
the production devices and maintaining consistent point-in-time images.
In CDP, data changes are continuously captured and stored in a separate location from the
primary storage. Moreover, RPOs are random and do not need to be defined in advance.
With CDP, recovery from data corruption poses no problem because it allows going back to a
PIT image prior to the data corruption incident.
EMC E10-001 Student Resource Guide. Module 11: Local Replication