Câu 18: H35-210-V2-5: HCIA-Access V2.5

The customer needs to access the following information points: AP, PC, POTS, and CATV. Which of the following statements about data transmission of these information points by ONUs is correct?

1. A. All types of data are encapsulated into Ethernet frames before PON-related encapsulation and transmission over one fiber.
2. B. When an OLT is connected downstream to an ONU, one fiber and two wavelengths are used to carry CATV and other services respectively. All services except CATV are encapsulated into Ethernet frames before PON encapsulation.
3. C. POTS voice services are TDM services and directly encapsulated in GEM frames. — đáp án hiện tại
4. D. When an OLT is connected downstream to an ONU, one fiber and two wavelengths are used to carry CATV and other services respectively. For all services except CATV, if POTS is a TDM service, it is transparently transmitted.