DEA-1TT5 Replication Technologies 2

Question 1

Which replication mode acknowledges a write after the data is written to a local persistent buffer but before the remote site confirms receipt?

Accepted Answer

Semi-synchronous replication

Answer

Semi-synchronous replication writes to a local persistent buffer and acknowledges the host, then propagates to the remote site, balancing near-zero RPO with reduced latency impact.

Question 2

What does 'delta replication' refer to in storage systems?

Accepted Answer

Replicating only the changed blocks or files since the last replication cycle

Answer

Delta replication transfers only the data that has changed since the previous replication pass, significantly reducing bandwidth consumption and replication time.

Question 3

In a fan-in replication topology, multiple source systems send their data to:

Accepted Answer

A single consolidated target system

Answer

Fan-in replication aggregates data from several source systems into a single target, commonly used for centralized backup or consolidation scenarios.

Question 4

What is the purpose of a 'replication consistency group'?

Accepted Answer

A set of volumes replicated together to maintain write-order consistency across all members

Answer

A consistency group ensures that a set of related volumes (such as those belonging to one application) are replicated in a coordinated, crash-consistent manner.

Question 5

Which replication mode is best suited for long-distance replication where network latency is a significant factor?

Accepted Answer

Asynchronous replication

Answer

Asynchronous replication decouples the host write acknowledgment from remote delivery, making it tolerant of high-latency WAN links over long distances.

DEA-1TT5 - Information Storage and Management Exam Practice Test

DEA-1TT5 - Information Storage and Management Exam Practice Test

DEA-1TT5 Replication Technologies 2