Which of the following technologies can be used to manage secure access to N8500 NFS shares? (Multiple choice)

• A.LDAP
• B.Homedir
• C.NIS
• D.AD

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Huawei remote replication technology is used in a disaster recovery solution and a consistency group is established. Which of the following statements is correct?

• A.The LUNs in the consistency group can come from different storage arrays.
• B.Support up to 4 consistency groups.
• C.If the data of a LUN in the consistency group is lost, the data of other LUNs will also become unusable.
• D.If the data of a LUN in the consistency group is lost, the data of other LUNs will not be affected in any way.

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Regarding the members of Huawei's remote replication consistency group, which of the following statements is correct? (Multiple choice)

• A.If a member replication link fails in the consistency group, the data replication of other members will also stop
• B.The master and the slave lun of the members of the remote replication consistency group can be in any controller
• C.All members synchronize together, split and switch between master and slave
• D.The remote replication consistency group and its members must have the same attributes

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Which of the following descriptions is incorrect about the technical principle of the DCL small bitmap in remote replication? (Multiple choice)

• A.Small bitmap technology can be applied to asynchronous remote replication.
• B.According to the principle of small bitmap technology, when there are 6 consecutive different addresses that need to be synchronized, the granularity of the copy at this time is 4KB.
• C.The small bitmap technology can reduce the amount of data copy and the risk of data loss, improve copy performance, and reduce RPO.
• D.Small bitmap technology splits a 64KB Chunk into 16KB Chunk with smaller granularity to record the difference.

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Regarding the principle of Erasure Code N+M redundancy technology implemented in Oceanstor 9000, which one of the following descriptions is wrong?

• A.The utilization of the protected data space is about N/(N+M), and the reliability of the data is determined by the value of M. The larger the M, the higher the reliability.
• B.Oceanstor 9000 system can configure different data protection levels for different directories/files.
• C.For every N chunks, calculate the parity block of M chunks according to the ErasureCode algorithm.
• D.The data written into the Oceanstor 9000 system will split Chunk according to the size.

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