As per Relevance of the word datagram, we have this rfc below:
Network Working Group J. Postel -
Request for Comments: 868 K. Harrenstien -
May 1983
Time
This RFC specifies a standard for the ARPA Internet community. Hosts
the ARPA Internet that choose to implement a Time Protocol are
to adopt and implement this standard
This protocol provides a site-independent, machine readable date
time. The Time service sends back to the originating source the time
seconds since midnight on January first 1900.
One motivation arises from the fact that not all systems have
date/time clock, and all are subject to occasional human or
error. The use of time-servers makes it possible to quickly confirm
correct a system's idea of the time, by making a brief poll of
independent sites on the network
This protocol may be used either above the Transmission Control
(TCP) or above the User Datagram Protocol (UDP).
When used via TCP the time service works as follows
S: Listen on port 37 (45 octal).
U: Connect to port 37.
S: Send the time as a 32 bit binary number
U: Receive the time
U: Close the connection
S: Close the connection
The server listens for a connection on port 37. When the
is established, the server returns a 32-bit time value and closes
connection. If the server is unable to determine the time at
site, it should either refuse the connection or close it
sending anything
Postel [Page 1]
RFC 868 May 1983
Time Protocol
When used via UDP the time service works as follows
S: Listen on port 37 (45 octal).
U: Send an empty datagram to port 37.
S: Receive the empty datagram
S: Send a datagram containing the time as a 32 bit binary number
U: Receive the time datagram
The server listens for a datagram on port 37. When a
arrives, the server returns a datagram containing the 32-bit
value. If the server is unable to determine the time at its site,
should discard the arriving datagram and make no reply
The
The time is the number of seconds since 00:00 (midnight) 1 January 1900
GMT, such that the time 1 is 12:00:01 am on 1 January 1900 GMT;
base will serve until the year 2036.
For example
the time 2,208,988,800 corresponds to 00:00 1 Jan 1970 GMT
2,398,291,200 corresponds to 00:00 1 Jan 1976 GMT
2,524,521,600 corresponds to 00:00 1 Jan 1980 GMT
2,629,584,000 corresponds to 00:00 1 May 1983 GMT
and -1,297,728,000 corresponds to 00:00 17 Nov 1858 GMT
Postel [Page 2]
if you see any problems within the linking, don't worry be happy,
this is version 0.1 of the Relevance System and you gotta expect some crappy subroutines sometimes,
just be content we did not write this in Java, which would have made this "bigger and better" HAHAHHA.
RFC documents can be found at I.E.T.F.
Relevance System Copyright © 2002 Spectrum WorldResearch
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