There is a lower limit for the length of the Ethernet frame. What is the main reason for this?

For inter-board wavelength protection and client-side 1+1 wavelength protection, it is forbidden to manually set the "laser status" of the backup OTU client-side optical interface to "on", otherwise the service will be interrupted.

When spreading the existing network WDM system, there is no need to evaluate which of the following performances

SYNLOCK V3 devices can achieve different clock accuracy levels through different board configurations. Which of the following is SYNLOCK V3 available? (multiple choice)

What is wrong with the workflow of U2000 CORBA and OSS interconnection?