Which of the following statements is true? (Multiple Choice)

• A.Asynchronous replication can be configured to use real-time replication.
• B.Synchronous replication supports two secondary LUN's.
• C.Asynchronous replication has no real distance limitation.
• D.Synchronous replication can impact performance of the primary LUN.

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Bank A has purchased Huawei's hybrid flash storage. The encrypted hard disk technology can enhance the security of business data. Which of the following statement is correct? (Multiple choice)

• A.External Key Manager is a key management application embedded in the storage system
• B.The encrypted hard disk technology uses the AES256 encryption algorithm to ensure that the data stored on the disk is encrypted and that the performance is not affected.
• C.OceanStor 18000/18000FV5 supports TPM for key protection
• D.External Key Manager adopts KMIP+TLS standard protocol

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The NAS system focuses on the storage and management of which of the following types of data?

• A.File data
• B.Continuous data block
• C.Small messages
• D.Large blocks of data

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Physical tape libraries have the following disadvantages: The mechanical failure rate is relatively high, and tapes are vulnerable to the adverse impact of the environment (temperature, humidity, and dusts).

• A.FALSE
• B.TRUE

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A vendor's distributed storage system was put into operation for 100 days, running 24 hours a day. A failure occurred in the morning of the 10th day, and it took 1 hour to recover from the failure. A failure occurred in the morning of the 25th day, and it took 4 hours to recover from the failure. A failure occurred in the morning of the 80th day, and it took 1 hour to recover from the failure.
Which of the following is the availability of the software system?

• A.0.9725
• B.0.9925
• C.0.9975000000000001
• D.0.9775

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