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什么是三层交换技术，三层交换机与二层交换机的应用场景详解！
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第三层交换机的设计基于对IP路由的仔细分析，把IP路由中每个报文都必须经过的过程提取出来，这个过程是十分简化的过程。IP路由中绝大多数报文是不包含选项的报文，因此在多数情况下处理报文IP选项的工作是多余的。
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