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余晟：TCP没那么难吧？
source link: https://news.cnblogs.com/n/606372/
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文/余晟如今相当多的程序员都是“互联网程序员”，按说，应该对互联网的基础协议相当清楚。可惜至少就我的面试经验来看，许多人这方面缺课太多，简单说说TCP/IP协议分层就已经难倒了不少人。至于TCP/IP的“三次握手”，能说上来的人就相当少了，如果再问问“为什么是三次握手”，基本就没人能答上来
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