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Huawei Certified Internetwork Expert-Transmission Sample Questions:

1. In the 40-wavelength system of the wavelength division equipment, due to the aging of the customer's optical cable, the optical cable is replaced between 2# and 3#, and 4# optical amplifier site needs to be added between 2# and 3#. Which of the following statements is correct?

A) No need to consider whether the dispersion budget is sufficient
B) Need to consider whether the dispersion budget is sufficient
C) 2# The optical power of the site does not need to be re-commissioned
D) 3# The optical power of the site does not need to be re-commissioned

2. What are the principles of synchronous Ethernet planning? (multiple choice)

A) When there is BITS or other high-precision external clock equipment, it is recommended that the network element use the tracking external clock source
B) The internal clock source is recommended as the lowest level clock source
C) When there is no BITS or other high-precision external clock equipment, it is recommended that the network element track the line clock source
D) When stopping the SSM protocol, do not configure the clock as a ring in this network. When starting the SSM protocol, the SSM protocol information of all network elements in the network must be set to be consistent

3. Regarding the UGUUI dual-machine system, which of the following statements is correct is () (multiple choice)

A) The current U2000 V1R9 dual machine supports all three operating systems, Solaris, Linux, and Windows
B) In the process of dual-unit network, a single site can only be configured with one network card IP address. That is, only the system IP address is configured, and the Veritas heartbeat IP, Veritas replication IP and network management application IP are not configured separately, and all reuse the system IP address
C) The protection mechanism of the high availability system lies in two aspects: ① The database synchronization and backup of the primary and standby sites; ② The application software of the primary and standby sites is automatically switched
D) The same license file is usually used for both the active and standby U2000

4. Which of the following are the background reasons for the introduction of coherent communication ()? (multiple choice)

A) When the baud rate is increased to 100Gbaud/s, the spectral width of the BPSK/DPSK pattern has exceeded 50GHz, and 50GHz interval transmission cannot be achieved
B) The conventional 40G DQPSK PMD is only 6~8ps. After the rate is upgraded to 100G, the PMD tolerance will be reduced by more than half, and it cannot support long-distance non-relay transmission.
C) For incoherent signals with a 40G data rate, a TDC module needs to be added to the receiving end, which has a slow response speed and does not support 1+1 protection scenarios, etc.
D) The biggest technical difficulty of coherence lies in high-performance FEC coding, and high-performance FEC coding is available in 2011

5. What should be paid attention to when planning 1588V2 network? (multiple choice)

A) It is recommended to adopt BC mode for the whole network in the networking mode
B) In practical applications, there may be a distance difference between the two directions of the fiber optic transceiver, but there is no need to compensate for this. 1588V2 will automatically calculate it according to the algorithm
C) 1PPS+TOD interface is more suitable for short distance (100m) transmission
D) BMC algorithm must be activated to prevent looping

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