物理层 Physical layer

（重定向自Physical signaling sublayer）

物理层（Physical Layer）是计算机网络OSI模型中最低的一层。物理层规定:为传输数据所需要的物理链路创建、维持、拆除，而提供具有机械的，电子的，功能的和规范的特性。简单的说，物理层确保原始的数据可在各种物理媒体上传输。

局域网路与广域网络皆属第1、2层。

单词	Physical signaling sublayer
释义	Physical signaling sublayer 中文百科物理层 Physical layer （重定向自Physical signaling sublayer）物理层（Physical Layer）是计算机网络OSI模型中最低的一层。物理层规定:为传输数据所需要的物理链路创建、维持、拆除，而提供具有机械的，电子的，功能的和规范的特性。简单的说，物理层确保原始的数据可在各种物理媒体上传输。局域网路与广域网络皆属第1、2层。英语百科 Physical layer 物理层（重定向自Physical signaling sublayer） In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer. The implementation of this layer is often termed PHY. The physical layer consists of the basic networking hardware transmission technologies of a network. It is a fundamental layer underlying the logical data structures of the higher level functions in a network. Due to the plethora of available hardware technologies with widely varying characteristics, this is perhaps the most complex layer in the OSI architecture.
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Physical signaling sublayer

物理层 Physical layer

Physical layer 物理层