In Frame Relay， FECN messages indicating congestion are sent or received by which of following？（）
- A、Sent by the destination
- B、Received by the sender
- C、Received by the destination
- D、Sent by the sender
正确答案:C
答案解析:有
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In Frame Relay， FECN messages indicating congestion are sent or received by which of following？（）
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