For WDM networks, the following descriptions are correct

• A.For OAU boards, the type of DCM module connected on site can be roughly judged based on the difference between the output of POUT and the input of BAIN
• B.For OAU boards, you can roughly judge the type of DCM module connected to the site according to the upper threshold of nominal gain (dB) on the network management system-the upper threshold of actual gain (dB)
• C.For 10G and 100G mixed transmission networks, you can judge whether the dispersion compensation is consistent with the design according to the performance of 10G
• D.For 10G and 100G mixed transmission networks, you can judge whether the dispersion compensation is consistent with the design according to the performance of 100G

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Regarding the differences between Linux and Solaris operating systems, the following statement is wrong ()

• A.Linux comes with fssnap command to create and manage file system snapshots. Solaris does not have such a file system snapshot tool
• B.Solaris itself only supports UFS hard disk file system; in Linux, there are many disk file systems to choose from, the default is ext3
• C.All disks need to be recognized by the operating system, but Solaris needs to be set in the sd.conf file, and linux does not
• D.Manage hot-swappable devices through cfgadm in Solaris. When the device is connected in Linux, the system automatically recognizes and configures hot-swappable devices

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Preparation conditions for single-site commissioning of transmission equipment include (multiple choices)

• A.Whether the related optical fiber and cable are installed in place
• B.Whether the hardware installation is qualified
• C.Does the power supply have
• D.Make sure that the network management program installed on the laptop is normal

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Before configuring SOM, the physical fiber connection from OMCA to the optical amplifier board must be completed, and the logical connection fiber from OMCA to the optical amplifier board does not affect the OMS path generation, so it does not affect the configuration of SOM.

• A.TRUE
• B.FALSE

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A network element cannot join the smart domain after the smart feature is enabled. The possible reasons are: (multiple choice)

• A.The smart domain is not refreshed;
• B.The electrical layer DCC is not surging;
• C.ODU1_PM_AIS exists on the N board;
• D.The network element data is not uploaded;
• E.N board DCC management RES_ODU channel status is not enabled;

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