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Which of the following WAN protocols is a packet switching technology?（）
- A、Frame Relay
- B、POTS
- C、PSTN
- D、ISDN
参考答案
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PSTND
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Data, Frame, Segment, Packet, BitC
Data, Packet, Frame, Segment, BitD
Data, Packet, Segment, Frame, BitE
Data, Segment, Frame, Packet, BitF
Data, Segment, Packet, Frame, Bit
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