A library copies its circulation database nightly and keeps the copies for three weeks; separately it writes a quarterly set to offline media held for seven years to satisfy a records-retention statute. Which pair of terms names the two practices, in that order?
A library copies its circulation database nightly and keeps the copies for three weeks; separately it writes a quarterly set to offline media held for seven years to satisfy a records-retention statute. Which pair of terms names the two practices, in that order?
Answer
Backup, then archive
Options - A. Backup, then archive - B. Archive, then backup - C. Both are backups — they differ only in the interval between copies - D. Both are archives — any copy written to offline media is an archive - E. Backup, then replication Why - A. Correct. A backup restores recent state after loss, over hours to weeks; an archive retains data for months or years to meet legal and operational needs. - B. Reversed. The three-week nightly set is the backup; the seven-year statutory set is the archive. - C. This is the trap. They are not the same operation at different intervals: they differ in purpose, retention, and who may delete them. - D. The medium does not decide it. A backup may be offline and an archive may be online; the distinguishing question is what the copy exists to answer. - E. Replication keeps a live second copy current, which is neither of these — a replicated deletion is deleted twice. Two decisions belong to planning for both: online or offline, and stored locally or transported off site. The provider whose attackers destroyed the live sites *and* every online backup is the case that settles the offline argument.
Stallings & Brown 5e ch12 §12.1–12.3, §12.5; NIST SP 800-123 *Guide to General Server Security* (EXT); ASD *Strategies to Mitigate Cyber Security Incidents* (EXT)