二三层网络原理讲解

Опубликовано: 12 Июль 2026
на канале: IT常识

992

02：20 二三层网络原理说明通信协议
03：37 MAC地址
04：51 两台电脑直连2层传输
06：30 三种发送方式
08：43 二层交换机工作原理
14：16 IP地址段与子网掩码
18：55 三层网络IP分类
23：01 网关路由
28：01 ARP协议

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