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网络原理学习 #73

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swiftwind0405 opened this issue Dec 1, 2020 · 0 comments
Open

网络原理学习 #73

swiftwind0405 opened this issue Dec 1, 2020 · 0 comments

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@swiftwind0405
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swiftwind0405 commented Dec 1, 2020 •
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网络OSI七层模型：
image

模型 概述 单位
物理层 网络连接介质，如网线、光缆，数据在其中以比特为单位传输 bit
数据链路层 数据链路层将比特封装成数据帧并传递 帧
网络层 定义IP地址，定义路由功能，建立主机到主机的通信 数据包
传输层 负责将数据进行可靠或者不可靠传递，建立端口到端口的通信 数据段
会话层 控制应用程序之间会话能力，区分不同的进程
表示层 数据格式标识，基本压缩加密功能
应用层 各种应用软件
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