Huawei Certified Internetwork Expert-Transmission - H12-931-ENU Exam Practice Test

A. On the OptiX OSN 8800, the active/standby status of the clock board and cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or clock board.

B. On the OptiX OSN 6800, the active/standby status of the clock board and cross-connect board are related to each other. During the switching test, it is recommended to switch only the cross-connect board or clock board.

C. To test the long-term stability of the time performance in the PTP synchronization mode, the output time performance should be within ±1us.

D. Long-term jitter test in physical layer synchronization mode, using a time analyzer with GPS receiver to observe at the end node for more than 8 hours, and the test output time performance should be within ±1us.

A. If the local RMU is used to add waves and has an optical amplifier, the OSNR value of the wavelength in the pass-through direction detected by SOM will deviate from the actual value

B. The source and sink optical amplifiers of the optical crossover at this site must be in the same network element

C. There is a local optical amplifier but no filter, the full-wave noise of the local optical amplifier affects the OSNR of the wavelength in the pass-through direction

A. For 10G and 2.5G systems, adjust the received optical power of the wavelength conversion board to "high 3 low 5", which is 3dB higher than the receiving sensitivity and 5dB lower than the overload point.

B. Adjust the VOA (adjustable optical attenuation) in front of the optical amplifier board so that the input optical power of the board = the input single-wave nominal optical power + 10lgN, where N is the actual wave number. If it is not adjusted to the nominal value, adjust the VOA attenuation to the minimum.

C. The actual gain upper threshold of an OAU is smaller than the nominal gain upper threshold, indicating that the performance of the OAU board is degraded and it is recommended to replace it.

D. Adjust the OAU gain of the optical amplifier board to make the output optical power reach the standard.

A. S-VLAN

B. VLAN

C. MPLS

D. IP

A. FALSE

B. TRUE

A. OSS system (Operation Support System) refers to a software system that provides operators with functions such as communication equipment performance management, inventory management, business management, and fault management.

B. U2000 supports multiple northbound interfaces such as SNMP, TL1, XML, CORBA, etc., which can realize rapid integration with the operator's OSS system.

C. The network layer of OSS is above NMS, and NMS is generally used to realize the management function of network element equipment.

D. OSS system is mainly used to improve the work efficiency of equipment maintenance personnel.

A. FALSE

B. TRUE

A. If the current optical power difference between the main and backup channels exceeds the "main and backup channel difference threshold (dB)", the system will undergo protection switching.

B. "Initial difference between the main and backup channels (dB)"-used to set the reference value of the optical power difference between the main and backup channels of the board.

C. "Main and standby channel difference threshold (dB)" One is used to set the signal failure (SF) when the difference in optical power between the main and standby optical ports of a single board reaches a certain value.

D. When the difference between the main and standby optical power exceeds the threshold, the optical switch will switch the service to the standby channel, and the set value supports query. The recommended setting is 5db.

A. Activate

B. Load

C. Submit

D. Distribution

A. For services that use the command line or the network management for single-site SDH service configuration, the path search must be performed on the network management to ensure that the service configuration is complete and standardized

B. Circuit scheduling is created and configured using network management end-to-end path management

C. Paths with protected routes should be tested for switching to verify that the configuration is complete and standardized

D. For cross-network management services, landing through virtual network elements

A. RED

B. WRED

C. PQ

D. WFQ

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 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

D. When there is no BITS or other high-precision external clock equipment, it is recommended that the network element track the line clock source

A. MTU parameter setting is too small

B. SDH line VC4 channel failure

C. Optical fiber connection error

D. Ethernet port attribute setting error

A. Beidou + Rubidium Atomic Clock

B. Cesium Atomic Clock + Rubidium Atomic Clock

C. GPS+ Rubidium Atomic Clock

D. GPS+ crystal clock

A. This ODU can be used as low station

B. The transmitting frequency of this ODU is located in sub-band A of 7GHz

C. The transceiver interval of this ODU is 154MHz

D. The receiving frequency range is: 7582-7638MHz