Uninformed: Informative Information for the Uninformed

Vol 2» 2005.Sept

IP Timestamp Option

Like the ICMP TIMESTAMP request, IP also has a timestamp option (type 68) that measures the number of milliseconds since midnight UT. This could also be used to determine down to a millisecond resolution what the remote system's clock is set to. Since the measurement is the same, the limitations are the same as ICMP's TIMESTAMP request.