The characteristic of the open DWDM system is that there are no special requirements for the optical interface of the multiplexing terminal, and only these interfaces are required to comply with the optical interface standard recommended by ITU-T. The DWDM system adopts wavelength conversion technology to convert the optical signal of the multiplexed terminal into a specific wavelength, and the optical signal of different terminal equipment is converted into different wavelengths that comply with ITU-T recommendations, and then multiplexed.
Answer(s): A
Which of the following conditions will cause multiple channels to report BEFFEC-EXC alarms at the same time?
Answer(s): B,C,D
What are the possible reasons for the unsuccessful OCH creation by the path method?
Answer(s): A,B,C
When the data link layer of a router (IP forwarding) receives a packet whose length is greater than the maximum MTU of the interface that the router will send out, which of the following strategies is adopted?
Answer(s): B
The router works on the third layer (network layer) of the TCP/IP protocol stack. Which of the following is the main job it completes?
Answer(s): C
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