How Many Backup Sets are Needed to Retrieve Lost Data? | CompTIA Network+ N10-007 Exam

Company policy dictates that full backups are taken every Sunday evening, and incremental backups occur Monday through Saturday in the evening.

If data loss were to occur on a Thursday before the backup window, which of the following is the number of backup sets that would be needed to retrieve the lost data come Friday morning?

A.

1

B.

2

C.

3

D.

4

E.

5

D.

In this scenario, if data loss occurs on a Thursday before the backup window, we need to determine the number of backup sets required to retrieve the lost data by Friday morning.

As per the company policy, full backups are taken every Sunday evening, and incremental backups occur Monday through Saturday in the evening. This means that if data loss occurs on a Thursday before the backup window, we can only retrieve the data that was backed up until Wednesday evening.

Therefore, to retrieve the lost data by Friday morning, we would need the following backup sets:

1. The full backup from the previous Sunday
2. The incremental backups from Monday, Tuesday, and Wednesday

So, we need a total of 4 backup sets (1 full backup + 3 incremental backups) to retrieve the lost data come Friday morning.

Therefore, the correct answer is option D, i.e., 4.