ISO 17355:2007定义了用于空间环境中应用的CCSDS文件传递协议（CFDP）和相关服务。它旨在用于在空间环境中使用的当前和设想的分组传送服务，包括 CCSDS常规分组远程命令； CCSDS常规分组遥测； CCSDS先进轨道系统（AOS）路径服务。 它还可以在各种各样的地面网络服务上操作，包括CCSDS为交叉支持目的指定的那些。该协议在空间到地面、地面到空间和空间到空间的传输方向上运行。它可以由文件发送或接收实体发起。为了互操作性，协议元素被包括用于基于“文件存储”或用于存储文件的介质的公共模型的假设的标准文件操作操作的通用形式。然而，应当认识到，文件存储管理系统的精确性质和能力是依赖于操作系统的，因此，该协议假设虚拟文件存储和相关服务，实现必须将其映射到所使用的实际文件存储的能力。 应用范围和领域在随附的CCSDS出版物的1.2和1.3子条款中进一步详细说明。

ISO 17355:2007 defines a CCSDS file delivery protocol (CFDP) and associated service for application in the space environment. It is intended for use over the current and envisaged packet delivery services used in the space environment, including

• CCSDS conventional packet telecommand;
• CCSDS conventional packet telemetry;
• CCSDS advanced orbiting systems (AOS) path service.

It may also operate over a wide variety of ground network services, including those specified by the CCSDS for cross-support purposes. The protocol operates in the space-to-ground, ground-to-space, and space-to-space directions of transfer. It may be initiated by the file sending or receiving entity. In the interests of interoperability, protocol elements are included for generalized forms of standard file manipulation operations based on assumptions of a common model for a ‘filestore', or medium used to store files. It is recognized, however, that the precise nature and capabilities of filestore management systems are operating-system dependent and, for that reason, the protocol assumes a virtual filestore and associated services that an implementation must map to the capabilities of the actual filestore used. The scope and field of application are furthermore detailed in subclauses 1.2 and 1.3 of the enclosed CCSDS publication.