What are two benefits of synchronous replication? (Choose two.)

Question

Options

• AIt ensures data consistency.
• BIt maintains server response time under load.
• CIt has no impact to response time over distance.
• DIt allows faster recovery than asynchronous replication.

• A
  93% (27)
• B
  3% (1)
• C
  3% (1)

Explanation

Synchronous replication guarantees data consistency (A) because the primary node waits for the replica to confirm each write before acknowledging success to the client - meaning both copies are always identical, with zero data loss on failover. This also enables faster recovery (D) because the replica is perpetually current, allowing an immediate cutover with no replication lag to catch up.

B is wrong - synchronous replication hurts response time under load; the primary must wait for replica acknowledgment on every write, adding latency to each operation.

C is wrong - distance has a direct, significant impact on synchronous replication performance; greater physical separation between nodes means higher network round-trip time, which adds to every write's response time (this is actually one of its main drawbacks vs. asynchronous).

Memory tip: Think of synchronous as "wait for it" - the server waits for confirmation before moving on. This makes data rock-solid (consistency + instant recovery), but that waiting has a cost (slower response, worse over distance).

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