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  3. Computer networks may be divided accordi

Computer networks may be divided accordi

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问题 Computer networks may be divided according to the network topology upon which the network is based, such as (   ) network, star network, ring network, mesh network, star-bus network, tree or hierarchical topology network. Network topology signifies the way in which devices in the network see their physical (   ) to one another. The use of the term “logical” here is significant. That is, network topology is independent of the “(（）)” hierarchy of the network. Even if networked computers are physically placed in a linear arrangement, if they are connected via a hub, the network has a (   ) topology, rather than a bus topology. In this regard, the visual and operational characteristics of a network are distinct; the logical network topology is not necessarily the same as the physical layout. Networks may be classified based on the method of data used to convey the data, these include digital and (请作答此空) networks.A.starB.ringC.meshD.tree
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答案 A
解析 计算机网络的划分是根据网络所基于的网络拓扑，如总线网络，星型网络，环形网络，网状网络，星型-总线网络，树/分层拓扑网络。网络拓扑表示网络中的设备看待相互之间物理关系的方式。“逻辑”这个术语的使用在这里是很重要的。因为网络拓扑和网络中的物理层是独立的，虽然联网的计算机从物理上展现出来的是线型排列，但是如果他们通过一个集线器连接，这个网络就是星型拓扑，而不是总线型拓扑。在这方面，肉眼看到的和网络的运行特点是不一样的。逻辑网络拓扑不一定非要和物理布局一样。网络或许可以基于传送数据的方法来划分，这就包括数字网络和模拟网络。
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中级 信息安全工程师

软件水平考试初中高级

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