Which of the following description about the characteristics of big data for IDC are correct? (Multiple choice)

• A.Variety
• B.Velocity
• C.Value
• D.Volume

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During the process of the data migration in SmartMigration, the data request issued by the host I/O is synchronized to the source LUN and target LUN in real time through double writing, ensuring that the data after the migration is completely consistent. Which of the following statement about double writing is correct? (Multiple choice)

• A.Double write can make the I/O request of the source LUN be issued to the local Cache and the opposite Cache at the same time, so as to ensure the data consistency of the local Cache and the opposite Cache.
• B.During the dual writing process, the source and target luns have their own DLC record data differences.
• C.Only the source and target ends can write successfully to eliminate DLC, otherwise keep DCL

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In an OceanStor 9000 system, the total number of nodes is 10. What data protection levels can be configured for it? (Multiple choice)

• A.6+3
• B.6+4
• C.4+5
• D.6+5

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Which backup system network can be used for all storage types?

• A.LAN-Base
• B.Server-Free
• C.LAN-Free
• D.Server-Less

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Which type of files is not recommended to be transferred through ASCII of FTP?

• A.*.bat
• B.*.cfg
• C.*.bin
• D.*.txt

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