A storage administrator must choose the best replication methodology for storage. The datacenters are on opposite sides of the country. The RPO is 24 hours. Replication and customer access use the…

Question

Options

• AAsynchronous
• BRegional
• CMultiregional
• DSynchronous

• A
  71% (42)
• B
  19% (11)
• C
  3% (2)
• D
  7% (4)

Explanation

The constraints are: geographically distant datacenters (opposite coasts), RPO of 24 hours, shared connections for both replication and customer access, and no replication impact during business hours. Asynchronous replication satisfies all of these. It writes data locally first and replicates to the remote site later in the background-this means writes are never blocked waiting for cross-country confirmation, so customer-facing performance is unaffected. Because the RPO is 24 hours (not seconds or minutes), real-time consistency is not required, making async perfectly acceptable. Asynchronous replication can also be scheduled for off-peak hours. Synchronous replication (D) requires every write to be acknowledged by both sites before returning to the application; over a cross-country WAN this adds significant latency to every write and would directly degrade customer access on the shared link. Regional and Multiregional (B, C) describe cloud storage topology classes, not replication methodologies.

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