多选题When analog signals are digitized using the G.711 codec， voice samples are encapsulated into protocol data units （PDUs） involving which three headers？ （）AIPBTCPCRTPDUDPEH323FCRTP
多选题
When analog signals are digitized using the G.711 codec， voice samples are encapsulated into protocol data units （PDUs） involving which three headers？ （）
A
IP
B
TCP
C
RTP
D
UDP
E
H323
F
CRTP
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