Regarding file operation and maintenance, the following are wrong ()

• A.For text files, ascll is not available for transmission
• B.The file compressed with winzip on the PC can be decompressed with the unzip command on the workstation
• C.When using ftp to transfer files, ASCII files can be transferred in binary mode, but binary files cannot be transferred in ASCII mode
• D.To transfer a file on your own PC to the workstation, you can use the put command

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The C-band 40-wave system is transformed into a C-band 80-wave system. The correct description is (multiple choice)

• A.There is no change in the optical power of the OTU WDM side
• B.Unprotected networking operation process will interrupt the original business
• C.Need to re-adjust the light emission power
• D.The original business signal-to-noise ratio remains unchanged after operation

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NG-SDH products initially support the board-level hot patch function. V100R008 starts to support both board-level hot patch and patch package functions (the hot patch upgrade method supported by different main control types is different), and it is supported from V100R010 and later versions.

• A.Board-level hot patch and patch package function
• B.neither support
• C.Patch package function
• D.Support board-level hot patch function

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The clock ID can solve the problem of timing loops that may occur. In the following networking, in order to completely solve the clock loop, how many clock IDs need to be set?

• A.7
• B.3
• C.4
• D.6

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Regarding the description of OSS, what is wrong is

• A.OSS system (Operation Support System) refers to a software system that provides operators with functions such as communication equipment performance management, inventory management, business management, and fault management.
• B.The network layer of OSS is above NMS, and NMS is generally used to realize the management function of network element equipment.
• C.OSS system is mainly used to improve the work efficiency of equipment maintenance personnel.
• D.U2000 supports multiple northbound interfaces such as SNMP, TL1, XML, CORBA, etc., which can realize rapid integration with the operator's OSS system.

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