The reason why the ODUk_PM_OCI alarm statement is correct (multiple choice)

If there is a problem with the CORBA connection, it can be analyzed as follows: If it is not a problem on the U2000 side, you should find it from the upper-layer network management itself or the U2000 and the upper-layer network management together; the name and notification service cannot be started normally, you should check whether the corresponding port is occupied, or Try to use other ports; if U2000 fails to start, check whether the CORBA configuration files bundle.cfq and ems.cfq are correct

Regarding the differences between Linux and Solaris operating systems, the following statement is wrong ()

It is known that the technical indicators of the GE optical interface of a certain PTN equipment are as follows: average transmit optical power (dBm): -5~0, receiving sensitivity (dBm): -23, minimum overload point (dBm): -3, minimum extinction ratio (dB) ): 9. For this optical interface, which of the following optical power (dBm) is the most suitable received optical power?

What problems in the network cannot be solved by QoS?