网络物理层中继器的相关内容

2.3.1计算机网络（物理层传输介质双绞线同轴电缆光纤中继器集线器）

物理层传输介质传输介质及分类传输介质也称传输媒体/传输媒介，它就是数据传输系统中在发送设备和接收设备之间的物理通路。传输媒体并不是物理层。传输媒体在物理层的下面，因为物理层是体系结构的第一层，因此有时称传输媒体为0层。在传输媒体中传输的是信号，但传输媒体并不知道所传输的信号代表什么意思。但物理层规定...

【计算机网络】物理层 : 物理层设备 ( 中继器 | 中继器两端 | 中继器使用规则 5-4-3 规则 | 集线器 )

文章目录一、中继器由来二、 "中继器" 概念三、 "中继器" 两端网络四、 "中继器" 使用规则 ( 5-4-3 规则 )五、集线器一、中继器由来信号的衰减失真 :① 信号衰减 : 信号在信道上传输 , 存在损耗 , 信号的功率会随着距离边长 , 而不断衰减 ;② 信号失真 : 信号功率 ...

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