According to the requirements, before OTN 6800/8800 equipment is upgraded, it is necessary to return the network element health check file to TAC analysis

• A.FALSE
• B.TRUE

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When planning AM, you need to consider the priority planning of E1. Which of the following options are the planning principles of E1 priority (multiple choice)

• A.The priority set when an E1 service passes through a multi-hop microwave link can be different.
• B.When the E1 priority function is enabled, E1 service bandwidth under full capacity ≤ full capacity service bandwidth-guaranteed capacity service bandwidth + E1 service bandwidth under guaranteed capacity.
• C.The E1 priority function is mainly used in the scenario of Hybrid microwave transmission IMA service. At this time, the guaranteed E1 capacity should be equal to the E1 capacity required by IMA to transmit high-priority services; the full-capacity E1 capacity should be equal to the E1 capacity used by IMA.
• D.The priority of the E1 service has nothing to do with the time slot number of the IF board it occupies, but the priority is specified when the cross-connection of the E1 service is configured. There are two types of E1 priority: high and low.

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The ring network of the OSN6800 equipment group was newly opened, and ODU1-SNCP/N protection was enabled. The engineer reported that a switch occurred one day and has not been restored, but there is no problem with the optical cable. There is an ODU_SNCP_PS alarm on the corresponding ND2 optical port.
Possible reasons are: (multiple choices)

• A.The protection type is configured as SNC/I
• B."LCK Insert" is set to enable the PM overhead of the related circuit board
• C.The related circuit board has a minor alarm ODU1_PM_LCK
• D.Related circuit board failure

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What problems in the network cannot be solved by QoS?

• A.Packet loss rate
• B.Transmission resource
• C.Service bandwidth
• D.Delay jitter in transmission

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Is the following statement about the delay test wrong? ()

• A.The time from the first bit of the data frame to the beginning of the time until the first bit of the data frame appears on the output port, the time difference between the two is the delay of the bit forwarding device
• B.The last bit of the data frame enters the device to start timing, and the first bit of the data frame appears at the end of the output port. The time difference between the two is the delay of the store and forward device.
• C.Delay is divided into the delay of storage and forwarding equipment and the delay of bit forwarding equipment. Huawei equipment is all storage and forwarding equipment.
• D.In the time delay test, the frame rate can be greater than the throughput

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