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【单选题】
计算机 A 与计算机 B 之间的网络连接的传输速率是 1kbps ,距离是 400000 公里,假定信号在传输媒介中的传输速度是 米 / 秒,每个分组的大小为 100 个字节,其中 20 个字节为分组头部信息 ( 存储发送地址等 ) ,假定计算机 A 发送每个分组前需要 0.2 秒对其进行封装等准备工作,那么,计算机 A 发送一个分组到计算机 B 的时延是 _______ ?A.
3 秒
B.
2 秒
C.
1 秒
D.
2.2 秒
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【单选题】which sport do you like best ?
A.
watching movies
B.
reading novels
C.
listening to music
D.
playing badminton
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