Description 1: Enterprises should know how much downtime costs, so as to determine the appropriate backup strategy
Description 2: RTO is not always important for business continuity, but RPO is important

• A.Both description 1 and description 2 are correct
• B.Description 1 is correct, description 2 is wrong
• C.Description 1 is wrong, description 2 is correct
• D.Both description 1 and description 2 are wrong

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Which of the following descriptions about the working principle of RAID 10 are correct? (Multiple Choice)

• A.When writing data to the RAID 10 group, the data is written in parallel between the subgroups, and the data in the subgroup is written by mirroring.
• B.When any two hard drives fail, RAID 10 can recover data.
• C.The number of hard drives in a RAID 10 group is always an even number
• D.RAID 10 combines mirroring and striping, performs RAID 1 mirroring first, and then performs RAID 0

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In the Huawei OceanStor V3 storage system, what kind of protocol is used for the mirroring channel between the controllers?

• A.iSCSI
• B.F COE
• C.IB
• D.PCI-E

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When engineer A is maintaining the Huawei all-flash storage system, he sees the alarm of the cascade module on the reverse side of "Alarms and Events" of Device Manager. After analysis, it is determined that this cascade module needs to be replaced. What are wrong during the replacement period? (Multiple Choice)

• A.After the expansion module replacement operation is completed, use label paper to mark the replaced expansion module
• B.Choose to replace the cascade module when the business is not busy
• C.Use Huawei Storage Product Networking Assistant to confirm the cable connection of the expansion module to be replaced

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Which is the correct description of the FTP file transfer protocol?

• A.Port 21 transmits data by default
• B.Transmission based on TCP protocol
• C.Cannot be used in Linux scenarios
• D.Port 21 create control information by default

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