Differential Backup Solution

Which of the following BEST describes the characteristics of a differential backup solution?

A.

Backs up files with the creation or modified date as the current date.

B.

Backs up all files and sets the archive bit.

C.

Backs up files with a date earlier than today's date with a clear archive bit.

D.

Backs up files with the archive bit set but does not clear the bit.

A.

A differential backup solution is a backup method that only backs up files that have changed since the last full backup. Therefore, option A which suggests that the backup solution backs up files with the creation or modified date as the current date is incorrect. This option is describing an incremental backup solution.

Option B suggests that the backup solution backs up all files and sets the archive bit, but this is incorrect because this is describing a full backup, not a differential backup.

Option C describes a differential backup solution. A differential backup solution backs up files with a date earlier than today's date with a clear archive bit. This means that the backup solution only backs up files that have changed since the last full backup, but it does not clear the archive bit. The archive bit is used to indicate whether a file has been backed up or not. Files with the archive bit set have not been backed up yet.

Option D is incorrect because it suggests that the backup solution backs up files with the archive bit set but does not clear the bit. This is describing an incremental backup solution, not a differential backup solution.

In conclusion, option C is the correct answer. A differential backup solution backs up files with a date earlier than today's date with a clear archive bit.