什么是DDN(数字数据网)啊?它是怎么工作的啊?DDN接入的网吧,或个人机器都怎么连接到因特网?怎么工作的.特性?我们现在的ADSL么类型的网?ISDN吗?
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 21:49:21
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