计算机网络的基础是通讯。两台计算机若要进行通讯,需要解决信息的发送、接收和转发问题,如果为计算机装载上能够完成上述功能的部件或者程序 — 被笼统地称为编解码器,则便可组成网络进行通讯。下图给出了网络通信的基本原理示意图,围绕该图回答问题。 计算机 A 与计算机 B 之间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,那么,每个比特在媒介中的传播时间是 _______ ?
A.
2 秒
B.
2 毫秒
C.
2 微秒
D.
2 纳秒
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【简答题】1 There’s too much noise and it’s difficult for Hector to _____________ (communicate / concentrate). 2 Hector says his _____________ (schedule / organization) is crazy and he has no time to study. 3 ...
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【简答题】There’s too much noise and it’s difficult for Hector to _____________ (communicate / concentrate). 2. Hector says his _____________ (schedule / organization) is crazy and he has no time to study. 3. N...
【简答题】Choose the correct words or expressions to complete the sentences . 1. There's
too much noise and it's difficult for Hector to (communicate / concentrate). 2. Hector
says his _____________ (schedule /...