Which of the following methods does the networking and application of NG WDM include? (Multiple choice)

In the electrical layer overhead processing-sink function, the signal flow is from the OCh to the client direction, the PM ODUkP is detected first, and then the TCM ODUkT is detected.

Which of the following are limitations of the alarm and performance analysis methods? (Multiple Choice)

The NG WDM two-dimensional ROADM site can use the WSMD9 single board, and its signal flow is an optical signal that is connected to the main optical channel from the "IN" optical port. The RDU (ROADM Demix Unit) optical module broadcasts 9 identical optical signals, which are output from the "DM1~DM8" and "ECPO" optical ports respectively. One of the signals is localized by the splitter board, and the other eight signals are dispatched to the other eight directions. Each wave of the main optical channel is connected from the "EXPI" optical port. The multiplexed or single-wave optical signal that needs to be inserted locally is input through the "AM1"~"AM8" optical port.

Which of the following description of the ASON software structure is correct? (Multiple Choice)