Which of the following are not part of the 400G originating modulation technology?

Which of the following operating modes does the AT8 board support? (Multiple Choice)

The length range of the DATA field in the Ethernet frame structure is ().

Which particles can be cross-scheduled for the cross-board of the OSN 8800 device? (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.