Free Huawei Certified Network Professional Transmission MSTP Transmission H31-321 Exam Practice Test

According to the extended SSM protocol, clock switching is performed firstly according to clock priorities, and secondly according to clock quality levels.

• TRUE
  
• FALSE
  

Which of the following are false about service protection and restoration on an ASON network?

• Typically, services are protected using the pre-allocated resources between NEs, These resources cannot be shared on the entire network.
  
• Generally, services are restored using any resource between NEs.
  
• Generally, protection switching time is less than 50 ms. During service rerouting, service routes need to be re-calculated. Therefore, service restoration time is longer, and a service can be restored in seconds.
  
• When the route of a service fails, the network automatically seeks a substitute route, and the service restoration algorithm is different from the route selection algorithm.
  
• To enable the service restoration function on an ASON network, you need to reserve some idle resources for service rerouting. Services are restored in rerouting mode on an ASON network.
  

You need to plan the MS when gold services exist on an ASON network. Which of the following are true about MS planning?

• If only a few gold services exist, upgrade the gold services to diamond services.
  
• The MS should cover all nodes on which gold services are required to be configured. Multiple MSs can be used to cover more nodes on a complex network.
  
• If the gold services take up less than half of the optical path resources, set part of the MS for the gold services, in other words, only part of the VC-4 resources on the MS are allocated for the gold services.
  
• Services should be evenly distributed in an MS. Avoid high bandwidth utilization in certain portion of an MS but low bandwidth utilization in other portion of the MS.
  

Which file needs to be modified on the U2000 to change the VC-12 timeslot numbering policy?

• trans_ems.cfg
  
• locale, properties
  
• ems.cfg
  
• imap.cfg
  

Which of the following functions, when enabled, allows the transmitting laser of an optical port to be automatically shut down when the IN port fails to receive signals?

• LCAS
  
• ALS
  
• ALC
  
• LPT
  

Which of the following are false about software installation on the PC that runs the NMS?

• Ensure that anti-virus software is installed on the PC.
  
• Game software can be installed after anti-virus software.
  
• You can access the Internet on the PC.
  
• Regular upgrade is not needed for the anti-virus software.
  

In an SDH system, AU pointer justification events on most optical boards are detected through H1 and H2 bytes, namely, in remote detection mode.

• TRUE
  
• FALSE
  

On NG-SDH equipment, when a cross-connect board that is configured with equipment-level protection (such as TPS, BPS, PPS, and DLAG) is replaced, the services carried by the board will not be interrupted.

• TRUE
  
• FALSE
  

What may cause the HP_LOM alarm?

• Services are not configured on upstream NEs.
  
• The service level is set inconsistently at both ends.
  
• The C2 byte to be transmitted on the terminal NE is 0x00, and the pass-through NEs are set to pass through the overhead.
  
• The board (for example, a cross-connect board) is faulty, resulting in loss of the H4 byte or incorrect H4 byte.
  

Which of the following statements is false about pre-commissioning check?

• Verify that the equipment is properly grounded.
  
• An AUX board provides multiple RJ45 ports that receive same signals. Wrong port connections do not affect the equipment or boards.
  
• On an AUX board, LAMP1 is the cabinet alarm indicator output port and LAMP2 is the cabinet alarm indicator cascading input port. Verify that the ports are connected correctly, to prevent short circuits.
  
• Verify that the NMS is successfully installed.