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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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单选题Which of the following WAN protocols is a packet switching technology?（）A
Frame RelayB
POTSC
PSTND
ISDN
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Data, Frame, Packet, Segment, BitB
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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多选题Which of the following is not a valid reason for a packet to be punted？（）AThe TCAM has reached capacityBAn unknown destination MAC addressCA packet being discarded due to a security violationDA Telnet packet from a session being initiated with the switchERouting protocols sending broadcast trafficFA packet belonging to a GRE tunnel
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