新问题 23
Which of the following combinations of dynamic optical bifurcation multiplexing boards can build a reasonable ROADM site? (Multiple choice)

新问题 24
In the Colored&Directioned scenario of 4-dimensional ROADM, how many sets of M4OV+D40 are needed to realize local business scheduling to four directions?

新问题 25
By using the out-of-band FEC technology, the optical signal-to-noise ratio budget of the DWDM transmission network can be improved, and the length of the optical transmission section between DWDM transmission network elements can be increased.

新问题 26
Which of the following statements about PW APS 1:1 protection is correct? (Multiple choice)

新问题 27
Which of the following descriptions about the composition of the SOM system is wrong?

新问题 28
What are the options for the following alarms to be transmitted from upstream to downstream? (Multiple choice)

新问题 29
Both ETH PWE3 and TDM PWE3 services support point-to-point and point-to-multipoint scenarios.

新问题 30
1+1 optical line protection single-end switching is faster than 1+1 optical line protection double-end switching.

新问题 31
What are the causes of discrete services? (Multiple choice)

新问题 32
Which of the following is the maximum service capacity on the STM-4 bidirectional multiplex section protection ring composed of four network elements?

新问题 33
When PWE3 emulates TDM services, when the UNI side interface uses CRC4-multiframe access, which emulation method does PWE3 use?

新问题 34
When the GE service is encapsulated into the OTN frame structure and the SDH frame structure, the alarms reported by the client-side device are different.

新问题 35
The cascading methods for mapping Ethernet services to SDH include adjacent cascading and virtual cascading.

新问题 36
For the SSM protocol, which of the following statements are correct? (Multiple choice)

新问题 37
The OptiXtrans DC908 chassis can be a DC chassis or an AC chassis.

新问题 38
In the deployment or expansion scenario, alarm reversal can reverse the alarm state and reduce a large number of unnecessary alarm reports. Which of the following descriptions about alarm reversal is correct?

新问题 39
Among the following suggestions, which of the following protocols are related to WDM? (Multiple choice)

新问题 40
The scope of management of OMSn is the path from the input optical port on the multiplexer unit at the sending site to the output optical port on the demultiplexer unit at the receiving site. It is called the optical multiplex section (OMS) path.

新问题 41
Which of the following statements is wrong?

新问题 42
The frame structure of TU3 is a bit incomplete and needs to fill up the gap. This can effectively prevent which of the following phenomenon from occurring?

新问题 43
Wavelength division multiplexing technology is to multiplex optical signals of different wavelengths into the same optical fiber for transmission.

新问题 44
Which of the following parts does the general encapsulation format of PWE3 consist of? (Multiple choice)

新问题 45
When testing the overload point and sensitivity of the IN port of the OTU board, which of the following is unnecessary?

新问题 46
Which of the following are device types support the master-slave sub-architecture mode? (Multiple choice)

新问题 47
In an OA-free system, the lower threshold of the receive optical power of a line board or the WDM side of an OTU board Is the optical module’s receiver sensitivity plus 3 dB.