Which of the following boards can be inserted into the OSN 9800U64 subrack?

• A.TNV1N401
• B.TNF5UNQ2
• C.TN18LSC
• D.TN54GS4

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In order to quickly locate and eliminate the faults of optical network equipment in a timely manner, maintenance personnel are proficient in the basic operation of common transmission instruments. Which of the following instruments are commonly used in optical network equipment maintenance?

• A.Pigtail
• B.2M Bit Error Tester
• C.SDH Analyzer
• D.Multimeter
• E.Optical Power Meter
• F.Light decay

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For ODUK SNCP protection, which of the following types does not apply to the pass-through site being an electrical relay site?

• A.SNC/I
• B.SNC/S and SNCN
• C.SNC/S
• D.SNC/N

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Which of the following queue scheduling mechanisms can ensure the priority of the most urgent and critical services?

• A.WFQ
• B.RFO
• C.PQ
• D.BE

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Which of the following options are the basic requirements of DWDM system for light source

• A.Using LE
• B.The method using direct modulation
• C.Output standard and stable wavelength
• D.Larger dispersion tolerance

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