ISO/IEC 14165-521定义了一种应用程序编程接口（API），通过该接口，存储应用程序可以执行一个或多个SCSI目标或启动器的功能，并控制高性能命令/数据转发和操作设施。它用C语言描述了一组函数和数据结构，从存储管理应用程序的实现中抽象出平台的细节。光纤通道系列出版物为上层协议（ULP）提供了通用数据传输工具，如智能外围接口（IPI）和小型计算机系统接口（SCSI）命令集、高性能并行接口（HIPPI）数据帧、IP（互联网协议）等。

ISO/IEC 14165-521 defines an application programming interface (API) by which a storage application may perform the functions of one or more SCSI Targets or Initiators, and control high-performance command/data forwarding and manipulation facilities. It describes a set of functions and data structures in the C language abstracting the details of the platform from the implementation of a storage management application. The series of fibre channel publications provides a general data transport vehicle for Upper Level Protocols (ULPs) such as Intelligent Peripheral Interface (IPI) and Small Computer System Interface (SCSI) command sets, the High-Performance Parallel Interface (HIPPI) data framing, IP (Internet Protocol) and others.