When selecting the data backup type, which of the following descriptions is wrong?

• A.It is recommended to use a combination of three backup types: full backup, differential incremental backup, and cumulative incremental backup.
• B.If there is only cumulative incremental backup in the schedule, but no full backup, all files will be backed up when the cumulative incremental backup is performed for the first time.
• C.Differential incremental can save storage space to the greatest extent, and the backup window is small.
• D.If the backup strategy is a full backup combined with a differential incremental backup, after a system failure, if you want to restore the most recent data, you need to restore the data from the last full backup and all differential incremental backups after the full backup.

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Regarding deduplication on the target side, which of the following description is incorrect?

• A.The data block is transferred from the source end to the target end, and the deduplication operation is performed on the target end.
• B.Cannot save transmission bandwidth.
• C.Does not occupy the resources of the source.
• D.Target end deduplication is equivalent to post-processing deduplication.

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The HyperLock (WORM) feature of Huawei Storage enables files to be written only once, cannot be written repeatedly, and cannot be modified, deleted, or renamed.

• A.False
• B.True

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Which of the following statements about concepts related to the HyperReplication feature are correct? (Multiple choice)

• A.Split refers to the suspension of data synchronization from the primary LUN to the secondary LUN
• B.A consistency group refers to a collection of pairs associated with multiple services
• C.Pair refers to the data replication relationship between the master LUN and the slave LUN
• D.Synchronization refers to the process of copying data from the slave LUN to the master LUN

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The Huawei Oceanstor 9000 storage system adopts hierarchical security maintenance. What is not the security content of the application layer?

• A.Authorization and authentication mechanism
• B.Activity record
• C.Use SSH/SFTP method to avoid insecure network communication
• D.Password system

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