Which of the following are limitations of the alarm and performance analysis methods? (Multiple Choice)

• A.When some faults occur, there may be no obvious alarms or performance events reported, and sometimes no alarms or performance events are found.
• B.In the case of complex networking, service, and fault information, many alarms and performance events may occur along with the occurrence of faults. Due to too many reports and performance events, maintenance personnel are unable to analyze.
• C.Field maintenance personnel cannot understand the current operating condition of the equipment.
• D.The network administrator cannot obtain the current notifications of the device, the alarm occurrence time, and the historical alarm of the device.

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The following description of the Flexible ROADM, which is wrong?

• A.DFlexible ROADM is compatible with existing networks
• B.WSMD2 board supports F1exible ROADM configuration
• C.Flexible grid technology provides flexible bandwidth settings and flexible bandwidth allocation and scheduling.
• D.Improve spectrum utilization and meet flexible scheduling requirements in the future era of over 100 Gbit/= rate.

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Which of the following are the components of general package format of PWE3? (Multiple Choice)

• A.Type
• B.MPLS label
• C.Payload
• D.CW (Control Word)

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Which of the following statement about the MPLS-TP OAM level is correct?

• A.Section is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Service.
• B.Section is the service layer of the tunnel, Tunnel is the service layer of the PW, and PW is the service layer of the Service.
• C.Service is the service layer of the PW, PW is the service layer of the Tunnel, and Tunnel is the service layer of the Section.
• D.Tunnel is the service layer of PW, PW is the service layer of Service, and Service is the service layer of Section.

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The maximum optical power of light-emitting OBU output is 20dBm, which is used in the C-band 80 system. How much dBm should the single-wave standard output optical power be?

• A.+1dBm
• B.-2dBm
• C.+4dBm
• D.+7dBm

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