EPON ranging and delay compensation technology is the key to upstream channel multiplexing, which is mainly realized through the _____ process defined by MPCP .( Choose one or more )

EPON ranging and delay compensation technology is the key to upstream channel multiplexing, which is mainly realized through the _____ process defined by MPCP .( Choose one or more )
A . Discovery Processing
B . Regis tration Processing
C . Report Processing
D . Gate Processing

Answer: AD