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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
Which of the following statements is incorrect.
Which of the following statements is incorrect.A . In the connection model of MPLS VPN, the network is composed of the backbone network of the operator and each site of the user. The so-called VPN is the division of a site set, and a VPN corresponds to a set composed...
The communication network can be divided into local area network and wide area network according to the geographical scope it covers, and a metropolitan area network between the local area network and the wide area network. The wide area network is characterized by low delay, high data rate and reliable transmission.
The communication network can be divided into local area network and wide area network according to the geographical scope it covers, and a metropolitan area network between the local area network and the wide area network. The wide area network is characterized by low delay, high data rate and reliable...
If a network port that supports auto-negotiation is connected to a network port that does not support auto-negotiation, half-duplex to full-duplex may occur.
If a network port that supports auto-negotiation is connected to a network port that does not support auto-negotiation, half-duplex to full-duplex may occur.A . True B. FalseView AnswerAnswer: A
The optical monitoring channel is set up for the monitoring of the WDM optical transmission system. ITU-T recommends that the wavelength of 1510nm is preferred, and the capacity is 2MHz/s .
The optical monitoring channel is set up for the monitoring of the WDM optical transmission system. ITU-T recommends that the wavelength of 1510nm is preferred, and the capacity is 2MHz/s .A . True B. FalseView AnswerAnswer: B
