PTN's ACR time sodium and 1588 clock can achieve time synchronization.

• A.True
• B.False

Comment: *

Name: *

Email: *

Verification: *

In the PTNLTE solution, which source interface is used when deploying multi-hop daily BFD at the core L3 nodes in the prefecture and city?

• A.LOOPBACK port
• B.L3VE sub-interface
• C.City L3 node interconnection interface
• D.Link Aggregation Port

Comment: *

Name: *

Email: *

Verification: *

After the alarm inversion is set on the U2000, the alarm status of the board will also be changed accordingly, and the actual alarm status will no longer be indicated.

• A.True
• B.False

Comment: *

Name: *

Email: *

Verification: *

After the LAN is divided into VLANs, if computers in different VLANs want to communicate, IP routing needs to be established. Which of the following solutions can be used?

• A.STP
• B.L2 switch + router
• C.L3 Switch
• D.GVRP

Comment: *

Name: *

Email: *

Verification: *

In the WDM transmission system, the main factors that affect the unevenness of the power balance of each channel do not include the following?

• A.EDFA gain unevenness
• B.The main channel adjustable optical attenuator setting is unreasonable
• C.The cable attenuation is too high
• D.Inhomogeneity of insertion loss of each channel of the combiner/demultiplexer

Comment: *

Name: *

Email: *

Verification: *