ISO/IEC 14476-5:2008定义了支持IP多播的Internet上N-plex多播传输协议。它提供了会话控制和错误控制机制。对于会话控制，指定一个参与者来管理连接的创建/终止；参与者的加入/离开；以及允许特定参与者发送数据的令牌。对于差错控制，它提供了基于树的损失恢复机制；用两层逻辑树构造控制树；和逻辑树适应与数据包交付状态。 ISO/IEC 14476-5:2008规定了协议细节，如数据包格式、程序和参数值。该协议可用于需要多对多可靠数据传输服务的应用。

ISO/IEC 14476-5:2008 defines a protocol for N-plex multicast transport over the Internet where IP multicast is supported. It provides the mechanisms of session control and error control. For session control, one participant is designated to manage creation/termination of a connection; join/leave of a participant; and tokens which allow the specific participants to send data. For error control, it provides the mechanisms of tree-based loss recovery; control tree construction with two-layer logical tree; and logical tree adaptation with packet delivery status. ISO/IEC 14476-5:2008 specifies the protocol details such as packet format, procedures, and parameter values. This protocol can be used for the applications which require many-to-many reliable data delivery service.