题目内容

网络管理员用第二层交换机将网络分段的两个原因是什么?

A. 创建更多的广播域
B. 消除虚电路
C. 提高用户带宽
D. 隔离网段之间的流量

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————网络使用相同的基础设施传输语音,数据和视频信号。

1. The company (be) ______ in the land market since 1990 and it is now taking the lead in this field.

2. If you give us any opportunity to deal in your products, the result will be (entire) ______ satisfactory.

3. It is reported that the construction of the new subway (complete) ______ next month.

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