【单选题】【消耗次数：1】
一个VLAN可以看作是一个（ ）。
①
冲突域
②
广播域
③
管理域
④
阻塞域
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场域是法国社会学家（ ）提出的概念：“一个场域可以被定义为各个位置之间存在的客观关系的一个网络，或一个构型。”
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