(single) In the UA5000 system, which command can be used to view the progress during data backup and loading?

Which of the following bandwidth type does DBA in GPON network have? (Multiple choice)

PON splitter hang two levels optical splitter, level 1 is 1: 2; level 2 splitter is a 1:16. What is the total number of split ratio?

About the description of PPPoE, which of the following is not correct?

(single) Is the following description correct? In the EPON network, in order to avoid data collision and improve network utilization efficiency, the TDMA multiple access mode is adopted in the downlink direction and the data transmission of each ONU is arbitrated.