Server Time Protocol (STP) is a server-wide facility that is implemented in the Licensed Internal Code (LIC) of the IBM Z® platform. It provides improved time synchronization in a sysplex or non-sysplex configuration. This IBM Redbooks® publication is intended for infrastructure architects and system programmers who need to understand the STP functions. Readers are expected to be familiar with IBM Z technology and terminology. This book provides planning and implementation information for STP functions and associated software support for the IBM z16™, IBM z15®, and IBM z14® platforms.