广域网覆盖的地理范围从几十千米到几千千米，它的通信子网主要使用（）。_精华吧

广域网覆盖的地理范围从几十千米到几千千米，它的通信子网主要使用（）。

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广域网覆盖的地理范围从几十千米到几千千米，它的通信子网主要使用（）。

A.报文交换

B.分组交换

C.文件交换

D.电路交换

正确答案：分组交换

Tag：计算机网络千米子网时间：2022-01-27 21:36:01

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