Examkin

Soru

Zorluk: OrtaBusiness Continuity and Disaster Recovery

A financial services firm performs a full system backup every Sunday at 00:00. From Monday through Saturday, the network administration team performs cumulative differential backups every night at 23:00. If a primary database storage array suffers a total hardware failure on Friday at 14:00, which sequence of backup restorations will recover the system to its most recent available state with the shortest recovery time?

  1. Restore the Sunday full backup, followed by the Thursday differential backup.Cevap
  2. B
    Restore the Sunday full backup, followed sequentially by the Monday, Tuesday, Wednesday, and Thursday differential backups.
  3. C
    Restore only the Thursday differential backup directly to the replacement storage array.
  4. D
    Restore the Thursday differential backup first, followed by the Sunday full backup.

Cevap

Restore the Sunday full backup, followed by the Thursday differential backup.
Differential backups store all changed data since the last full backup. Restoring the baseline Sunday full backup followed immediately by the latest Thursday differential backup recovers the system to Thursday night's state in two steps.

Adım Adım Çözüm

1
Identify the backup baseline
The foundation for restoration is the Sunday full backup at 00:00.
Full backups provide the initial system state required before any differential sets can be applied.
2
Determine the differential backup characteristics
Differential backups capture all cumulative changes since the last full backup.
The Thursday 23:00 differential backup includes all data modified from Sunday 00:00 up to Thursday 23:00.
3
Select the optimal restoration sequence
Apply the Sunday full backup first, then apply only the Thursday differential backup.
This two-step process minimizes recovery time while restoring all data backed up prior to the Friday afternoon failure.

Anahtar Kavram

Differential Backup Restoration Sequence
Bu soruyu puanla

Konular

Business Continuity and Disaster Recovery

Bu konudan daha fazla soru