中等ICT-SECU-009
A useful backup of examination marks is:
A. The only copy, kept on the same disk as the original file.
B. A separate copy, stored somewhere else, and tested by restoring a file.✓ 答案
C. A copy left only in RAM.
D. A copy pasted into a phishing reply.
解說
A copy on the same disk dies with that disk. A backup has to be separate, and you only know it works if a restore has been tried.