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Which of the following descriptions are correct? (Multiple choice)
Which of the following descriptions are correct? (Multiple choice)A . The difference between a 1+1 linear multiplex section and a 1:1 linear multiplex section is whether APS is required. B. The 1:1 linear multiplex section can be equipped with additional services, and its switching mode is only double-ended recovery switching....
Which of the following statements about reuse is correct?
Which of the following statements about reuse is correct? In the process of byte interleaved multiplexing, the information payload and pointer bytes of each frame are interleaved and multiplexed according to the original value, and the segment overhead is also multiplexed accordingly.A . There will be 4 times the overhead...
In Ethernet, the frame length has a lower limit, which is mainly due to which of the following considerations?
In Ethernet, the frame length has a lower limit, which is mainly due to which of the following considerations?A . Carrier Sense B. Multi-point access C. Conflict detection D. Improve network bandwidth utilizationView AnswerAnswer: C
What are the following steps for low-speed services to be multiplexed into high-speed SDH services? (Multiple choice)
What are the following steps for low-speed services to be multiplexed into high-speed SDH services? (Multiple choice)A . Mapping B. Overhead Insertion C. Positioning D. MultiplexingView AnswerAnswer: ACD
Which of the following is related to pointer adjustment?
Which of the following is related to pointer adjustment?A . clock B. Speed C. Expenses D. ScramblingView AnswerAnswer: A
After mapping and multiplexing, 4 channels of ODU2 signals can be multiplexed into 1 channel of OTU3[ V ] signal, while for ODU2e signal, only 3 channels are needed to be multiplexed into 1 channel of OTU3 [V] signal.
After mapping and multiplexing, 4 channels of ODU2 signals can be multiplexed into 1 channel of OTU3[ V ] signal, while for ODU2e signal, only 3 channels are needed to be multiplexed into 1 channel of OTU3 [V] signal.A . True B. FalseView AnswerAnswer: A
If a bit error occurs in the SDH network, the service signal recovered after the signal is decapsulated must have a bit error.
If a bit error occurs in the SDH network, the service signal recovered after the signal is decapsulated must have a bit error.A . True B. FalseView AnswerAnswer: B
The most effective subnet mask for a point-to-point WAN link is 255.255.255.252 .
The most effective subnet mask for a point-to-point WAN link is 255.255.255.252 .A . True B. FalseView AnswerAnswer: A
The comb filter is an active optical device, its main function is to couple or separate odd and even waves in the same band.
The comb filter is an active optical device, its main function is to couple or separate odd and even waves in the same band.A . True B. FalseView AnswerAnswer: B
Chromatic dispersion includes material dispersion and waveguide dispersion. Generally, only material dispersion and waveguide dispersion are considered in single-mode fiber.
Chromatic dispersion includes material dispersion and waveguide dispersion. Generally, only material dispersion and waveguide dispersion are considered in single-mode fiber.A . True B. FalseView AnswerAnswer: A
