MPLS tunnel APS protection supports multiple types of command switching and has different priorities.
Which of the following command switching types has the highest priority?

The NS4 board features test includes: (Multiple choice)

Which of the following SOM systems is not monitored?

Which of the following is not a precaution after board replacement?

In the ROADM, which of the following layer of OTN paths do not need to be manually configured, it can be obtained directly by path search? (Multiple Choice)