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Huawei HCIA-Transmission V2.5 Sample Questions:

1. The clock unit can only access the external clock source as the timing signal source of the system through the external clock interface. In addition, it can also output the processed clock and provide the clock source for other devices that need timing.

A) False
B) True

2. There are two types of optical fiber dispersion, one is (), the other is ()

3. Which of the following are the benefits of polarization multiplexing technology? (Multiple choice)

A) The reduction of optical signal spectrum width will reduce the OSNR requirements of the optical transmission system, improve its dispersion tolerance and PMD tolerance performance, and enhance the ability to resist the nonlinear effects of optical fiber.
B) PDM-QPSK modulation code can reduce the line transmission baud rate, greatly reducing the bandwidth requirements for (optical) electronic devices.
C) PDM-QPSK technology reduces the optical harmonic width of the optical signal, making 50GHz interval WDM transmission possible and increasing the optical utilization efficiency to 2bps/Hz

4. The nominal rate of the OTU4 signal is 111809973.568 kbits, and we can generally consider the line rate to be about 112G.

A) False
B) True

5. When transmitting Ethernet services, which of the following encapsulation protocols is used for mixed docking of devices from different manufacturers?

A) LAPS
B) PPP
C) GFP
D) HDLC

Solutions: