Practice Free H12-931_V2.0-ENU Exam Online Questions
The existing network needs to be transformed into OMS’s 1+1 line protection. Which of the following is correct? (Multiple choice)
- A . OLP boards require high-power boards.
- B . The line power consumption of the main and backup channels should be within 3dB deviation
- C . The distance between the main and backup channels is within 10km
- D . The amplifier board configurations of the main and backup channels can be different
- E . The dispersion compensation of the main and backup channels can be different
NG-SDH equipment allocates ECC channel numbers according to certain principles. For example, by default, if a four-port board is first inserted in slot 4, the board is assigned channel numbers 0, 1, 2, and 3. Then, if an SL16 board is inserted in slot 2, the board is assigned channel number 4. If the SL16 board in slot 2 is removed and a four-port board is inserted in slot 8, what channel number will be assigned?
- A . 5, 6, 7, 8
- B . 4, 5, 6, 7
- C . 4, 6, 7, 8
- D . Random Assignment
When multiple alarms are reported, the priority principle of alarm processing is to process and troubleshoot the alarms in the order of equipment alarms (BUS_ERR, HARD_ERR, COMM FAIL, etc.), optical layer LOS, electrical layer OTUk_LOF, ODUk_SSF, and protection type protection switching.
- A . True
- B . False
Failed to create OCh using the path method. Which of the following are the possible reasons? (Multiple choice)
- A . There are still unresolved alarms on the board involved in the OCh
- B . The wavelength settings at both ends of the source and destination are inconsistent
- C . No service layer path
- D . Some pigtails are not connected
An operator needs to configure 60 clients, 200 OptiX PTN 1900s, 100 OptiX OSN 3800s (with ASON), 150 NE4OEs, 200 CX600 series devices, FTTxOLTs and MDUs on the access side, a total of 80,000 xDSL lines, 70,000 PSTN ports, and 30 OLTs and 300 MDUs. Which of the following description of this network is wrong?
- A . The number of physical network elements that the network management center needs to manage is 980
- B . 100 OptiX OsN3800s (with ASON) are equivalent to 350 network elements
- C . In practice, it is necessary to reserve expansion capacity at 50% of the current network size.
- D . The network is a medium-sized network
The rate represented by STM-1 is ().
Automatic gain control (AGC) can solve the problem in multi-wavelength systems where the increase or decrease in wave number causes energy transfer, thereby affecting the optical power of the normal operating wavelength.
- A . True
- B . False
When a working PQ1 fails, the equipment performs TPS protection switching.
Which of the following statements about the switching process are correct? (Multiple choice)
- A . The crossbar detects a working PQ1 failure through the board status bus.
- B . Protection PQ1 receives and processes the services transferred to the protection bus by D75S, completing the protection switching.
- C . D75S responds to the switching signal, transfers the service to the shared protection bus, and shuts down the service sent to the corresponding PQ1.
- D . If the protection PQ1 works normally, the cross-connect board sends a switching signal to the D75S corresponding to the faulty PQ1 through the switching control bus.
Which of the following statements is wrong about the test items of IEEE 1588V2 time protection function?
- A . The active and standby states of the clock board and cross-connect board on the OptiX OSN 8800 are related to each other. When performing a switchover test, it is recommended to only switch the cross-connect board or the clock board.
- B . The active and standby states of the clock board and cross-connect board on the OptiX OSN 6800 are related to each other. When performing a switchover test, it is recommended to only switch the cross-connect board or the clock board.
- C . Test the long-term stability of the time performance in PTP synchronization mode. The output time performance should be within ±1us.
- D . For the long-term jitter test of the physical layer synchronization mode, a time analyzer with a GPS receiver is used to observe at the node for more than 8 hours. The test output time performance should be within ±1us.
What network problems can’t QoS solve?
- A . Business single width
- B . Delay jitter in transmission
- C . Packet loss rate
- D . Transmission resources