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本文叙述了物理层在开放系统互连模型(OSI)中的位置。介绍了ISO的DP9160模式的应用范围和领域及ISO的可适用接口。对ISO模型中的一些术语作了定义,对ISO的使用作了一般要求。指出ISO有同步加密操作和异步加密操作两种。
This article describes the location of the physical layer in the Open Systems Interconnection Model (OSI). Introduced the application scope and field of ISO DP9160 mode and the applicable interface of ISO. Some terms in the ISO model are defined, making general use of the ISO. It is pointed out that ISO has two kinds of operations: synchronous encryption and asynchronous encryption.