刷题刷出新高度,偷偷领先!偷偷领先!偷偷领先! 关注我们,悄悄成为最优秀的自己!

单选题

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 (请作答此空) 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.

A
random
B
big
C
medium
D
small
使用微信搜索喵呜刷题,轻松应对考试!

答案:

A

解析:

在多点网络中,当站点检测到通道繁忙时,存在树持久方法。在1-persistent方法中,站点在检测到线路空闲后会立即发送帧。由于两个或多个站点可能会同时检测到线路空闲并立即发送帧,因此这种方法发生碰撞的机会是随机的(random)。而在nonpersistent方法中,要发送帧的站点会检测线路,如果线路空闲则立即发送,否则等待一段时间再次检测。这种方法减小了碰撞的机会,因为不太可能有两个或多个站点等待相同的时间并同时重试发送。因此,正确答案是:第一空填"random",第二空填"big",第三空填"small"。

创作类型:
原创

本文链接:In multipoint networks , there are tree persistenc

版权声明:本站点所有文章除特别声明外,均采用 CC BY-NC-SA 4.0 许可协议。转载请注明文章出处。

让学习像火箭一样快速,微信扫码,获取考试解析、体验刷题服务,开启你的学习加速器!

分享考题
share