Timestamp:
• RFC778: DCNET Internet Clock Service.
• RFC958: Network Time Protocol (NTP).
• RFC4330: Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and
• RFC781: Specification of the Internet Protocol (IP) timestamp option.
• RFC1185: TCP Extension for High-Speed Paths.
• RFC1323: TCP Extensions for High Performance.
• RFC2783: Pulse-Per-Second API for UNIX-like Operating Systems, Version 1.0.