Huawei HCIA-Transmission V2.0 - H31-311 Exam Practice Test
The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.
Correct Answer: B
The SL64 board can be used in an OSN 2500.
Correct Answer: A
Which of the following are different types of ESCs divided by implementation principles?
Correct Answer: A,C
Which of the following service levels cannot be selected during service configuration?
Correct Answer: D
After an optical fiber is connected according to the networking diagram, if a critical alarm is reported on the optical port, the SRV indicator on the line board is red.
Correct Answer: B
The backplane has two -48 V power supply cables, and each board obtains two -48 V power supplies from the backplane. After the power supplies are combined by diodes, various voltages required by each component are obtained through the DC/DC power module and linear conversion.
Correct Answer: B
Which of the following statements about the 1+1 protection of cross-connect boards are correct? (Multiple Choice)
Correct Answer: A,B,E,F
The clock unit can access an external clock source as the timing signal source of the system only through the external clock interface. In addition, it can output the processed clock and provide the clock source for other devices that require timing.
Correct Answer: A
Which of the following statements about extended ECC is incorrect?
Correct Answer: B
The SP3D board supports 63 El services.
Correct Answer: A
Which of the following working windows is indicated by "2" in the optical module parameter L-64.2"?
Correct Answer: D
The SNCP switching speed can be improved if you classify the SNCP services that have the same source, sink, or route into groups.
Correct Answer: B
In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and usage information of clock sources?
Correct Answer: C