When you merge audit logs from several systems, the date and time on those systems must be accurate. Similarly, when you send audit logs to a remote system, the recording system and the repository system must have accurate clocks. The Network Time Protocol (NTP) keeps system clocks accurate and coordinated. For more information, see Chapter 3, Time-Related Services, in Introduction to Oracle Solaris 11.2 Network Services and the xntpd (1M) man page.