In the name of _________, people resort to all these means.
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According to the author, American is perhaps the ____________ nation in the history of civilization with all this "security".
When we recall this era, the legacy we remember best is that we may have locked the evils out, but in doing so we have _____________.
以下属于数据链路层的设备是()
A. 中继器
B. 交换机
C. 路由器
D. 网关
在以太网中,设备()可以将网络分成多个冲突域,但不能将网络分成多个广播域。
A. 网桥
B. 中继器
C. 路由器
D. 集线器