Which common backup method is the fastest on a daily basis?
A.
Full backup method
B.
Incremental backup method
C.
Fast backup method
D.
Differential backup method
The Answer Is:
B
This question includes an explanation.
Explanation:
The incremental backup method only copies files that have been recently changed or added. Only files with their archive bit set are backed up. This method is fast and uses less tape space but has some inherent vulnerabilities, one being that all incremental backups need to be available and restored from the date of the last full backup to the desired date should a restore be needed.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 3: Telecommunications and Network Security (page 69).
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