Lan cable procurement and the principle of lan cable
一般情况下,网络从上到下分为五层:应用层、传输层、网络层、数据链路层、物理层。每一层都有自己需要遵守的规则。 TCP/IP协议是一组最常用的网络协议。 Lan cable procurement and the principle of lan cable. 局域网电缆属于网络中的物理层。计算机中要传输的数据按照这些协议被分解为一个数据包,然后按照一定的原理通过局域网电缆传输到目的计算机。 一般来说,我们寄信去真,先把信的内容(计算机数据)写进信封,然后写上封面上的地址(打包成包含本机地址和目的机器地址的数据包) ),最后发送(transmission),那么lan线就相当于你的地址和你要发送的地址的方式。 (1)如上所述,网线和电线传输电力的原理是相同的,但脉冲电信号在网线上传输,必须遵守一定的规则。 (2)计算机上的数据都是用0和1来保存的,所以在网线上传输时,需要用一个电压值来表示数据0,用另一个电压值来表示数据1。 (3)数字信号在网线上的传输。 (4) 网线的传输线是传输电信号的,会有电流通过,就会产生电磁场。几条网络线之间的电磁场互相干扰,会影响电压从而使数据失真。因此可以将它们绞合在一起,有效抵消这条线的相互电磁干扰。

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