When configuring the Ethernet Layer 2 attribute, set the Default VLAN ID and VLAN Priority of the untagged frame when the TAG ID is set to Accese or Hybrid. The "VLAN priority" is set according to the QoS of the unified plan.

• A.FALSE
• B.TRUE

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Which of the following methods can be used to analyze faults in the NG WDM system?

• A.Replacement
• B.Service Signal Flow Analysis
• C.Loopback
• D.RMON

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The causes of discrete services are as follows:

• A.The cross-connection configuration on the NE is incorrect.
• B.A subnet service whose source or sink port is not in the management scope of the U2000 is available.
• C.The configuration data on the NE side is not uploaded to the U2000.
• D.The logical fiber connection of the NE is inconsistent with the physical fiber connection.

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When performing fiber synchronization, the network element does not create a fiber. What does it indicate?

• A.Fiber connection only on the NE side.
• B.The fiber connection exists on both the network management side and the network element side.
• C.Fiber connection exists only on the local network management side.
• D.Fiber connection that does not exist on the network management side and the NE side.

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Which of the following operating modes does the AT8 board support? (Multiple Choice)

• A.Reverse 2E2M
• B.Reverse 1E1M
• C.2E2M
• D.1E1M

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