H31-311_V2.5 HCIA-Transmission V2.5 Questions and Answers
RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.
For the devices that support multiple transmission rates and working modes, the____mechanism can be used to determine the optimal communication mode between two connected
devices. (Enter only lowercase letters.)
Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).
When an OTU board works with an OLP board, the optical power difference cannot be used as a trigger condition for intra-board 1+1 protection switching.
Single fiber unidirectional transmission provides higher bandwidth than single-fiber bidirectional transmission.
Two PIU or APIU boards of an OpCXtrans E6616/OptiX OSN 1800V Pro are used to supply power for the system In hot backup mode. When either of the two PIU or APIU boards is faulty, the system can still function properly.
Which of the following is the difference between an AU pointer and a TU pointer? (Multiple choice).
Which of the following are device-level protection schemes for SDH products? (Multiple choice).
An unprotected chain consists of four net elements; ME1, NE2, NE3 and NE4.
Create an end-to-end VC4 path NE1-NE4 and add NE5 between NE2 and NE3 for capacity expansion.
The original configuration remains unchanged and no services are configured on the NE5.
In this case, the unprotected chain becomes NE1-NE2-NE5NE3-NE4, how many VC4 paths can be searched?
QinQ technology can be used when multiple users need to share the same VCTRUNK and use the same VLAN ID.
When using a script to back up and restore network configuration data for the U2000, you can change the directory where the export file is saved.
In WDM systems, it is ideal to use a dielectric thin film filter (TFF) when using less than () wavelengths.
Which of the following alarm/event storage modes does U2000 support? (Multiple choice).
In the case of a 1+1 linear MSP, which of the following switching modes does not require the APS protection protocol full (multiple choice) to be enabled
Which of the following bridges are used to forward data based on the MAC address and VLAN ID carried in the data?
The number of bit False blocks on each VC4 channel is detected by B3 on the receiving side. At the same time, the information is sent back to the sender via Q, and HP-REI and HP-FEBBE report on the sender.
On the NMS system, the network element performance monitoring time is set to () minutes and () hours.
Which of the following are the service board types for MSTP devices? (Multiple choice).
Some SNCP protection inversion conditions are default, such as AU-AIS and TU-AIS. Other conditions are optional, such as HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the level of the costume.
Hitless protection switching (HPS) provides the dual fed and selective receiving function for fiber differential protection services and aligns the end-to-end latencies of the working and protection paths, improving service reliability.
Which of the following statements about the OTM-n .m and OTMnr .m for OTN are incorrect?
In the frame structure of the SDH signal, there are large overhead bytes for operation, management, and maintenance (OAM). Overhead bytes account for all bits () of the entire frame and greatly enhance the monitoring capabilities of the network.
During service configuration, which of the following service levels cannot be selected?
Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice).
OTM nr.m consists of up to n " multiplexed channels and does not support non-channel-related overhead. The letter " r " indicates a decrease in functionality.
Forced switching, fiber switching, manual switching and motion switching are decreased in order of priority.
According to the formula " ODUk rate = 239/(239k) x STM-N frame rate " , ODU4 The rate is equal to the 239/235xSTM-N Pa rate.
PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.
When the working PQ1 board is oversized, the device will perform and the TFS protection will be reversed. Which of the following statements about the switching process are correct? (Multiple choice).
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 a processed clock and provide a clock source for other devices that need timing.
Which of the following device domains can be managed by U2000? (Multiple choice).
There are 48 bits in MAC address. The first ( ) bits make up a unique identifier for the vendor and the last ( ) bits are allocated by the vendor
The TAG attribute cannot be set for the internal port VCTRUNK of the single board on the NMS.
Which of the following logical function modules is used to generate exhaust R-LOS alerts?
When ODUk 5NCP is configured, common WDM services can be converted into SNCP services, but SNCP services cannot be converted into common WDM services.
Which of the following statements regarding the protection of the cross-connecting plate 1+1 is correct? (Multiple choice).
Optical module parameter " L-64.2 " in the " 2 " indicates which of the following working windows?
If you group SNCP services with the same source, sink, or route, you can increase the SNCP switching speed
When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)
In the system control unit, which of the following databases does not lose data after a power failure? (Multiple choice).
Frame-Mapped GFP (GFPF > is a processing mode that targets data encoding blocks such as Fibre Channel and ESCON.
Suppose 2 VC-12 time slots need to be bound to the VCTRUNK1 of the N2EFS4 board. When there are 8 VC4 slots on the N2EFS4 board, which of the following slots meets the requirements?
When the sender detects that the b6-b8 of the K2 byte is 110, it means that the sender has reported an alarm ().
The dual fiber ring topology consisting of three network elements is arranged in counterclockwise order as the service between A, B and C A and C occupies the first VC-48 on the short path VC-12 time slots, B and C of the same service also occupy the 48th of the first VC-4 on the short path VC-12 time slots
output networks require higher costs than belt networks, but provide a more reliable management channel.
Which of the following can be configured as the monitoring time for network element performance events?
Which of the following logic function blocks are involved in processing clock signals? (Multiple choice).
When the bridge uses IVL learning mode, an entry in the MAC address table is created based on the source MAC address and source port of the teach frame. This entry applies to all VLANs
The OTN signal has a fixed pad period, the same frame period as the SDH signal.
EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?
For MSPs, you need to set the MSP protocol ID for each NE. To ensure that each ID is unique, it is recommended to set the MSP protocol ID to the value that is compatible with the network element ID.
The backplane has two 48V power cords, and each board gets two -48V power supplies from the backplane. After combining the power supply via diodes, the various voltages required for each component are obtained by means of a DC/DC power module and a linear mane swap.
Which of the following statements about the EFS4 board are correct? (Multiple choice).
The nominal rate of OTU4 signals is 111,809,973.568 kbit/s. Generally, the line rate is 112 Gbit/s.
When the low-level resources of the device are insufficient, which of the following measures can be taken? (Multiple choice).
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