NEW QUESTION 250
When a device that supports auto-negotiation is connected to a device that does not support auto- negotiation, a duplex mode mismatch may occur. What are the manifestations? (Multiple choice)

NEW QUESTION 251
Colored scene can use TM20/TD20 board to add and subtract waves.

NEW QUESTION 252
SDH signals must be scrambled before transmission over optical fiber.
Which of the following bytes is not scrambled? (Multiple choice)

NEW QUESTION 253
The frame structure of ODU4 is four times that of ODU1

NEW QUESTION 254
Currently, 32-bit IP addresses are no longer sufficient, and MPLS labels are only 20 bits, so MPLS labels will not be sufficient as the network becomes larger.

NEW QUESTION 255
What is the line code type of the commonly used SDH optical interface?

NEW QUESTION 256
By default, if the B2 bit error exceeds which of the following thresholds, a B2-EXC alarm will be generated?

NEW QUESTION 257
Which of the following is the basic requirement of DWDM system on the light source?

NEW QUESTION 258
In the Colored & Directed scenario of 4D ROADM, how many sets of M40V+D40 are needed to dispatch local services to four directions?

NEW QUESTION 259
EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?

NEW QUESTION 260
The TTI in the segment monitoring overhead SM provides TIM mode setting selection. Which of the following options are available? (Multiple choice)

NEW QUESTION 261
Which unit is newly added in Liquid OTN?

NEW QUESTION 262
The number of ODU2e signals multiplexed into the ODU3 signal is the same as the number of ODU2 signals multiplexed into the ODU3 signal

NEW QUESTION 263
In the system control unit, which of the following databases does not lose data after a power failure? (Multiple choice).

NEW QUESTION 264
Which of the following different types of ESC are divided according to the principles of implementation? (Multiple choice)

NEW QUESTION 265
TNG 1N401 board supports mixed transmission of multiple ODUk particles.

NEW QUESTION 266
The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().

NEW QUESTION 267
Which is the basic requirement of DWDM system for light source?

NEW QUESTION 268
What is the frame structure of STM-16?

NEW QUESTION 269
R-LOS alarm has nothing to do with overhead bytes but only with the input signal quality.

NEW QUESTION 270
When a FAS anomaly is detected, what are the possible options for reporting alarms? (Multiple choice)

NEW QUESTION 271
The number of error blocks in each VC4 channel is detected by B3 at the receiving end. At the same time, this information is sent back to the transmitting end by which of the following items? and reported as HP.REI and OHP-FEBBE at the transmitting end.