【单选题】【消耗次数：1】
网络中各个节点相互连接的形式，叫做网络的（ ）。
①
拓扑结构
②
协议
③
分层结构
④
分组结构
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根据网络的拓扑结构可分为？
①
以太网、令牌环网、光纤分布数字接口网
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<img src=http://p.ananas.chaoxing.com/star3/origin/44ee0085c9af58bc60f06911bcbd9b31.png/>
①
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②
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