In the network management planning process, which item is not completely necessary?

• A.Network scale planning, network management deployment planning
• B.DON network planning, OSS connection planning
• C.Network parameter planning and reliability planning of the network management server
• D.Network management software/hardware configuration

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The insertion loss of the 40 sub-wavelength channels of D40 is 6dB, regardless of the influence of noise, when the signal is full-wave, the IN port optical power of D40 is X dBm. If the optical power of the IN port is reduced by 1dB, The measured value is () dBm. (Assuming that the optical power of each channel is balanced, lg40=1.6)

• A.(X-5)
• B.(X-22)
• C.(X-6)
• D.(X-23)

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There are two NG-SDH network elements A and B.
A is a gateway network element.
The network manager manages B through ECC routing through A.
The network manager can log in to A, but cannot log in to B through A.
What are the possible reasons? (multiple choice)

• A.Manually set up ECC routing
• B.Cross-connect board is not inserted
• C.The main control board is abnormal
• D.The optical board connected to B does not create a logical board

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If a ROADM site adopts WSS+RMU configuration, which of the following influences on SOM is wrong ()?

• A.If the local RMU is used to add waves and has an optical amplifier, the OSNR value of the wavelength in the pass-through direction detected by SOM will deviate from the actual value
• B.The source and sink optical amplifiers of the optical crossover at this site must be in the same network element
• C.There is a local optical amplifier but no filter, the full-wave noise of the local optical amplifier affects the OSNR of the wavelength in the pass-through direction

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In the Solaris dual-system hot backup system, using "ls -l" to query the file1 file information is "-rwxr-xr-- 2wjm newservice 321 Oct 17 09: 33 file1" The following statement is wrong ()

• A.Characters 2-4 "rwx": indicates that the file owner wjm's rights to file1 are readable, writable and executable
• B.Characters 5-7 "rx": indicates that the rights of all users in this user group newservice to the file file1 are: readable, not writable, executable
• C.The fifth field "321": indicates that the size of the file is 321kb
• D.The 8th-10th character "r--": indicates that the rights of other users to file1 are readable, not writable, and not executable"

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