In multipoint networks , there are tree 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 (请作答此空) 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.
Aidle
Bbusy
Cuseful
Dunusable
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ends on the length of the frame and on the( ) time; the longer the frames or the shorter the propaga
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n, VMWare and Yahoo. This answers a question that the entire industry has had, and that is how do yo
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