本文件规定了用于确保跨网络（例如IEEE 802和类似媒体）的音频、视频和时间敏感控制等时间敏感应用程序满足同步要求的协议、程序和托管对象。这包括在正常运行期间，以及在添加、移除或故障网络组件和网络重新配置之后，保持同步时间。它规定了IEEE 1588？规范的使用，适用于IEEE Std 802.1Q？-2018.1与外部提供的定时信号同步的情况[例如，公认的定时标准，如协调世界时（UTC）或国际原子时（TAI）]不属于本标准的一部分，但不排除。

This document specifies protocols, procedures, and managed objects used to ensure that the synchronization requirements are met for time-sensitive applications, such as audio, video, and time-sensitive control, across networks, for example, IEEE 802 and similar media. This includes the maintenance of synchronized time during normal operation and following addition, removal, or failure of network components and network reconfiguration. It specifies the use of IEEE 1588？ specifications where applicable in the context of IEEE Std 802.1Q？-2018.1 Synchronization to an externally provided timing signal [e.g., a recognized timing standard such as Coordinated Universal Time (UTC) or International Atomic Time (TAI)] is not part of this standard but is not precluded.