A technician needs to restore data from a backup. The technician has these files in the backup inventory: Which of the following backup types is being used if the file 01062020.bak requires another file to restore data?
正解:B
a. A snapshot is a point-in-time copy of data that does not depend on other files. A differential backup backs up files that have changed since the last full backup and does not require any other file to restore data.