Which of the following statements regarding the protection of the cross-connecting plate 1+1 is correct? (Multiple choice).

The source business board sends services to the main and standby crossover boards. .
After the service cross-connection is completed, the active and standby cross-board sends the data of the primary cross-board to the receiving service board.
The receiving service board can only receive data from the active cross-link board
The bus of the two cross-connected modules works independently and does not interfere with each other. .
Dual bus system structure indicates that the service board performs dual data transfer to the cross- connection side and selectively receives data on the cross-connection side. .
Both cross-connecting plates have the same configuration. The service board will selectively receive services from one of them based on the quality of service and the status of the cross- connecting board. .

Answer(s): A,D,E,F