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Huawei Certified Internetwork Expert-Transmission Sample Questions:

1. The optical power of one wave is 3dBm, and the optical power of the other wave is 5dBm. The total optical power after the two waves are combined is 3+5 = 8dBm

A) TRUE
B) FALSE

2. The single-fiber bidirectional optical interface of PTN equipment distinguishes upstream and downstream service flows according to time slots.

A) TRUE
B) FALSE

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

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

4. Regarding the OSNR test of the OTN system, which of the following statements is correct? () (multiple choice)

A) The integral method test OSNR is also called the turn-off method, and the channel business will be interrupted during the test. And in the case of a small number of waves, the OSNR value measured by the integral method has a certain deviation from the true value
B) When using OSA to test OSNR, because the noise in the signal band cannot be directly tested, the out-of-band noise interpolation method is adopted to calculate the noise in the band
C) The out-of-band noise interpolation method refers to inserting the noise of the instrument to replace the actual noise of the system
D) After the wavelength signal passes through a filter device such as D40, the noise power between channels will be reduced, so the OSNR value of the traditional OSA test is higher
E) The 40G and 100G wavelengths overlap due to the signal spectrum, and the OSNR value tested by the traditional OSA test method is low
F) OptiX OSN8800/6800 equipment MCA online test 100G wavelength OSNR also uses the shutdown method

5. Drift refers to the long-term phase change of the digital signal relative to the standard signal less than 10 Hz, and jitter refers to the short-term phase change of the digital signal relative to the standard signal greater than 10 Hz.

A) TRUE
B) FALSE

Solutions: