Practice Free H12-931_V2.0-ENU Exam Online Questions
Which of the following is wrong about optical power adjustment?
- A . For 10G and 2.5G systems, adjust the wavelength conversion board receiving optical power to "high 3 low 5", the high thousand receiving sensitivity is 3dB, and it is 5dB below the overload point.
- B . Adjust the VOA (adjustable optical attenuation) in front of the optical amplifier board so that the board input optical power = input single-wave nominal optical power + 10IgN, where N is the actual wave number. If the adjustment cannot reach the nominal value, adjust the VOA attenuation to the minimum.
- C . Adjust the optical amplifier board OAU gain to make the output optical power value reach the standard
- D . The actual gain upper threshold of an OAU is smaller than the nominal gain upper threshold, indicating that the performance of the OAU board has deteriorated. It is recommended to replace it.
The four network elements A, B, C, and D form an SNCP ring, and there are a large number of PDH services between A and B.
One day, the optical fiber between A and B was disconnected. In order to eliminate the RLOS alarm on the network management, an engineer looped the optical ports at both ends of the disconnected optical fiber. By default, after 10 minutes, what phenomenon will occur?
- A . The service between A and B is interrupted, and the switchover alarm disappears.
- B . The services of A and B are not affected, and the switchover alarm does not disappear.
- C . The service between A and B is interrupted, and the switchover alarm does not disappear
- D . The services between A and B are not affected, and the switchover alarm disappears.
What are the commonly used methods for providing network resource utilization? (Multiple choice)
- A . Dismantle the MSP large ring into small rings
- B . Change the protection mode, for example, change SNCP to MSP
- C . Add dots on the ring
- D . Change the protection mode, for example, change MSP to SNCP
One VC-4 can transmit () VC-12, that is, (63) 2.048 Mbit/s signals.
One VC-4 can transmit () VC-12, that is, (63) 2.048 Mbit/s signals.
On the U2000 network management system, the packet plane and TDM plane in the Hybrid MSTP device can be managed in a unified manner to achieve end-to-end service interoperability.
- A . True
- B . False
What technologies are used in the network of PTN equipment? (Multiple choice)
- A . L2VPN/L3VPN
- B . Physical layer synchronization + IEEE 1588v2 time synchronization/GPS
- C . LAG/LMSP/ML-PPP/Tunnel APS/PW APS
- D . MPLS/OSPF/IS-IS/BGP
The optical power of one wave is 3dBm, and the optical power of the other wave is 5dBm. The total optical power of the two waves after combining is 3+5 = 8dBm
- A . True
- B . False
Regarding the network-level protection switching test of the OTN system, which of the following statements is wrong? (Multiple choice)
- A . Since ODUk-SNCP does not involve switching protocols, we can guarantee to customers that the test switching time must be less than 50ms.
- B . The power difference between the main and standby channels of the OLP protection group exceeds 3dB by default, and an alarm is reported. The maximum value can be set to 8dB
- C . The default threshold of abnormal OLP master/slave optical power is 5dB or more and the switchover is performed. The threshold range can be set to -5-5.
- D . In the OTN-carrying SDH multiplex section ring networking scenario, in order to avoid simultaneous switching of OLP protection and MSP protection, a delay time can be set in the MSP protection group.
- E . Use ODUk-SNCP protection on top of OLP protection. To avoid secondary switching of SNCP protection, set a delay time in the SNCP protection group.
Which of the following items are optional items for microwave station commissioning?
- A . Align the antenna
- B . Test ECC
- C . Clock tracking test
- D . Testing business