The following statement is correct () (multiple choice)

• A.Volume manager and volume duplicator manage physical disks through logical "volumes", so the operating system and U2000 software are located on them
• B.Veritas is a highly reliable system composed of volume manager, volume replicator, local cluster software, etc.
• C.Local dual machine, Linux can use Bond mode to connect externally and support floating IP
• D.In any case, the backup machine does not write data to the data copy buffer area

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XPIC can be used in conjunction with ATPC, but it is generally not recommended.
If it needs to be used together, what should be paid attention to? (multiple choice)

• A.Set the ATPC lower threshold to be greater than the planned AM sensitivity under the full-capacity modulation mode plus 14dB.
• B.The horizontal polarization direction link and vertical polarization direction link of a group of XPIC should be configured with the same ATPC parameters (ATPC enable, ATPC adjustment threshold).
• C.If AM is used in conjunction, set the upper threshold of ATPC to the lower threshold plus 5dB.
• D.Set the ATPC upper and lower threshold difference as small as possible, and the recommended value is 5dB.

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In the acceptance test, the MPI-S reference point of the line power test refers to the output end of the transmitting amplifier.

• A.FALSE
• B.TRUE

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Throughput refers to the maximum rate of the network without frame loss. During the test, the test starts from the maximum line rate frame rate Xmax that the device can support. When the device starts to lose frames, reduce the frame rate. When the device does not lose frames Time, increase the frame rate

• A.FALSE
• B.TRUE

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The sequence of downstream signals flowing through the functional blocks of the SL16 circuit board is

• A.HPT, MSP, MSA, MST, RST, SPI
• B.HPT, MSA, MSP, MST, RST, SPI
• C.SPI, RST, MST, MSP, MSA, HPT
• D.SPI, MST, RST, MSP, MSA, HPT

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