Why is it important for organizations to implement a multi-site remote replication solution?
A. Ensure data protection is always available if there are any single site failures
B. Provide consistent near-zero RPO in the event of source and remote site failures
C. Perform synchronous replication with low network bandwidth
D. Recover data to any point-in-time in the event of a remote site failure
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A
I’ll go for option “A”. According to the ISM Study Guide Page:615, “Data from source site is replicated to multiple remote sites for DR purpose
− Disaster recovery protection is always available if any one-site failure occurs”.
Please notice the last portion of Answer B “event of source and remote site failures” according to the reference, The source-to-bunker site (target 1) replication is synchronous with a near-zero RPO. So, if both source and remote site fails, it cannot provide consistent near-zero RPO.
So, the Answer is “A”.
Is correct the B
Multi-site replication mitigates the risks identified in two-site replication. In a multi-site replication, data from the source site is replicated to two or more remote sites. In this approach, data at the source is replicated to two different storage systems at two different sites. The source-to-bunker site (target 1) replication is synchronous with a near-zero RPO. The source-to-remote site (target 2) replication is asynchronous with an RPO in the order of minutes. The key benefit of this replication is the ability to failover to either of the two remote sites in the case of source-site failure, with disaster recovery (asynchronous) protection between the bunker and remote sites.
https://www.mycloudwiki.com/san/storage-based-replication-overview/
My guess is D: Recover data to any point-in-time in the event of a remote site failure, regarding to Page 585 “Disaster recovery protection is always available if any one-site failure occurs”
correct answer = A
page 585 form ISM course