In multipoint networks,there are three persistence methods when a station finds a channel busy.In the 1-persistent method,after

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问题 In multipoint networks,there are three persistence methods when a station finds a  channel busy.In the 1-persistent method,after the station finds the line idle,it sends its frame  immediately.This method has the ________________ chance of collision because two or more stations  may find the line ________________ and send their frames immediately.In the nonpersistent method,a  station that has a frame to send  ________________ the line.If the line is idle.it sends immediately.If the  line is not idle, it waits a  ________________ amount of time and then senses the line again.The  nonpersistent approach ________________ the chance of collision because it is unlikely that two or more  stations will wait the same amount of time and retry to send simultaneously.The p-persistent  approach combines the advantages of the other two strategies.It reduces the chance of collision and improves efficiency.

选项 A、overhears
B、hears
C、1istens
D、senses

答案D

解析
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