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In multipoint networks,there are three persistence methods when a station finds a channel busy.In the 1-persistent method,after
In multipoint networks,there are three persistence methods when a station finds a channel busy.In the 1-persistent method,after
admin
2020-05-13
19
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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