The RPO in the disaster recovery system measurement indicators is used to measure the business recovery capability of the disaster recovery system

• A.True
• B.False

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Regarding the snapshot technology, which of the following statement is incorrect?

• A.After opening multiple snapshots of the same file system, roll back to one of the snapshots. After the roll-back is completed, all snapshots after the point-in-time when the target snapshot was created will be deleted
• B.When manually creating a snapshot for a file system, if the product specification limit is exceeded, a new snapshot cannot be created for the file system
• C.When rolling back a file system snapshot, you must cancel the shared mount of the source file system
• D.When creating a periodic snapshot for the file system, the storage system automatically deletes the earliest created snapshot and automatically generates a new snapshot

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PCIE is a high-performance and high-bandwidth serial communication interconnection standard to replace the bus-based communication architecture. It follows the existing PCI concepts and signal standards, and builds a higher-speed serial communication system standard.

• A.True
• B.False

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Among the following backup media, the order of unit capacity price from low to high is:

• A.CD/DVD, tape, virtual tape library, SSD
• B.CD/DVD, SSD, tape, virtual tape library
• C.Magnetic tape, CD/DVD, virtual tape library, SSD
• D.Tape, CD/DVD, SSD, virtual tape library

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