The collection and storage of on-site data includes periodic collection during normal operation of the equipment and collection of equipment failures. Generally, before the fault is processed, the maintenance personnel must collect and save the field data.

• A.FALSE
• B.TRUE

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Before querying the error and optical power on the network management, you need to perform the () operation. Otherwise, you cannot query the corresponding teaching data.

• A.Configuration data
• B.Turn on NE performance monitoring time.
• C.Create a logical fiber
• D.Synchronizing network metadata

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The transmission windows of 1310 nm and 1550 nm are low loss windows. In DWDM systems, only the 1550nm transmission window is used. Which of the following is the main reason?

• A.The nonlinear effect in the 1550nm wavelength region is very small.
• B.The 1550 nm wavelength region is suitable for long-distance transmission.
• C.The operating wavelength flatness area of EDFA is contained in this window.
• D.None of the above

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The main light path monitoring is based on the OMS segment and it mainly monitors which of the following items? (Multiple choice)

• A.Line attenuation compensation is abnormal
• B.Line attenuation exceeds the design EOL value.
• C.The origin of the optical discharge power is abnormal
• D.The main light path is broken?

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VPLS (Virtual Private LAN Service) is a Layer 2 VP technology that simulates a local area network.

• A.TRUE
• B.FALSE

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