Which  of the following statements about  EPCN  are correct?

Which  of the following statements about  EPCN  are correct?
A . EPCN  is a passive  EoC  technology.The user terminal is a passive device, and the system transmission loss tolerance is low, which limits its application scope to a certain extent.
B . EPCN  is an active  EoC  technology, and the user terminal is an active device, thus avoiding the limitation of the network topology without passive  EoC  technology.
C .EPCN  system main memory deployment coaxial cable distribution network portion of the network, the  HFC  backbone mainly  EPON  technology fit therewith.
C . EPCN  conforms to  HFC-  based broadband access specifications such as  DOCSIS 1.0/1.1/2.013.0  .

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Answer:   BC