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一篇文章搞懂，内网和外网到底怎么通信？
source link: http://network.51cto.com/art/201908/601179.htm
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对于我们网络开发的人员来说，经常会用到TCP,UDP协议，但是通常情况下，是在局域网内的协议交互通信。可你们有想过吗?如果是涉及到内网和外网的交互呢?也就是说局域网和公网是怎么交互呢?
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