If the line is idle , it sends immediately If the line is not idle , it waits a ( ) amount of time a
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.(2018年下半年网络管理员考试上午真题参考答案)
A.random
B.big
C.medium
D.small
参考答案:A
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