-取代。 本标准中提供了一种协议，该协议能够在使用网络通信、本地计算和分布式对象等技术实现的测量和控制系统中实现时钟的精确同步。该协议适用于通过分组网络进行通信的系统。异构系统能够包括各种固有精度、分辨率和稳定性的时钟来同步。以最少的网络和本地时钟计算资源支持亚微秒范围内的系统范围同步精度和精度。简单系统的安装和运行不需要用户的管理关注，因为协议的默认行为允许这样做。

- Superseded. A protocol is provided in this standard that enables precise synchronization of clocks in measurement and control systems implemented with technologies such as network communication, local computing, and distributed objects. The protocol is applicable to systems communicating via packet networks. Heterogeneous systems are enabled that include clocks of various inherent precision, resolution, and stability to synchronize. System-wide synchronization accuracy and precision in the sub-microsecond range are supported with minimal network and local clock computing resources. Simple systems are installed and operated without requiring the management attention of users because the default behavior of the protocol allows for it.