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【计算机网络】传输层 : 传输层概述 ( 设备层级 | 传输层功能 | TCP 协议 | UDP 协议 | 复用与分用 | 端口号 | 套接字 )

文章目录一、设备层级二、传输层功能三、传输层协议四、复用与分用五、端口号六、套接字一、设备层级设备层级 :① 传输层 : 主机才有传输层 ;② 网络层 : 网络层设备 , 如 : 路由器 , 最高只到网络层 ;③ 数据链路层 : 数据链路层设备 , 如 : 网桥 , 交换机 , 最高只到 ...

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