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102.OSI的7层模型和TCP与IP的4层模型 #102

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webVueBlog opened this issue Mar 5, 2023 · 0 comments
Open

102.OSI的7层模型和TCP与IP的4层模型 #102

webVueBlog opened this issue Mar 5, 2023 · 0 comments

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OSI: open system interconnection 开放式系统互联参考模型

OSI 和TCP/IP 的对应关系和协议

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OSI模型各层的基本作用

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OSI模型的详解（但是对会话层、表示层、应用层合并为TCP/IP的应用层）

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物理层

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数据链路层

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网络层

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传输层

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应用层

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pc连网的设置详解

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数据链路层数据包（以太网数据包）格式，除了应用层没有头部，其他都有

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由于以太网数据包的数据部分，最大长度为1500字节，当IP包过大时，会分割下来，但是每个分割包的头部都一样

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数据包在传送时的封装和解封装如下所示

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