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【尚大教育】2018下半年网络管理员上午真题(八)
来源:尚大教育-软考学院 作者:尚大教育 时间;2018-11-30 11:36:46 点击数: 尚大软考交流群:376154208
● 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 m
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● 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 (  ) 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.

(71)A.the lowest

B.the highest

C.possible

D.no

(72)A.idle

B.busy

C.useful

D.unusable

(73)A.overhears

B.hears

C.listens

D.senses

(74)A.random

B.big

C.medium

D.small

(75)A.increases

B.equalizes

C.reduces

D.cancels

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