What statement about the SATA and SAS technologies is true?

• A.Both use serial communication.
• B.Both use full-duplex communication.
• C.SATA and SAS support the same maximum number of devices on the bus.
• D.Both SATA and SAS are intelligent protocols with intelligent devices.

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Using SmartThin gives extra responsibility for the SAN administrator because there is a risk of over-provisioning storage capacity.

• A.FALSE
• B.TRUE

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A government unit adopts Huawei's two-site, three-center solution for disaster recovery construction, and its business is mainly concentrated from 8:00 to 18:00.
What is wrong with the following approach?

• A.Production centers and remote disaster recovery centers should use synchronous remote replication
• B.The time period for data synchronization between the production center and the disaster recovery center should be selected when the business volume at night is small
• C.You can use the BCManager software to set the data synchronization period
• D.When doing remote replication, a consistency group should be created according to the business of the unit, and related businesses are placed in a consistents

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In a NAS environment entire files are sent across the ethernet based network. The NAS server however stores these files in the form as SCSI blocks mostly on multiple disks using RAID protection.

• A.FALSE
• B.TRUE

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The following description of common storage protocols is correct?

• A.The ATA protocol uses a parallel interface, which can only be built-in and requires cable length
• B.The SCSI protocol does not support hot swap
• C.A SAS domain can connect 15 devices
• D.FC protocol has good compatibility and long transmission distance

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