/nsfnet/statistics/history.ports NSFNET History of Usage by Service Percentage of Packets File Networked Inter- Name Other Non- Exchange Mail active Lookup TCP/UDP TCP/UDP Services Services 1989 Aug 20 28 22 15 11 4 Sep 20 31 22 13 11 3 Oct 20 29 22 14 12 3 Nov 19 29 21 16 12 3 Dec 21 27 20 15 13 4 1990 Jan 26 26 19 14 12 3 Feb 25 27 18 13 13 4 Mar 25 27 18 12 13 5 Apr 25 28 20 13 8 6 May 26 26 17 10 16 5 Jun 25 25 18 12 14 6 Jul 25 24 20 12 15 4 Aug 27 24 20 11 15 3 Sep 28 23 19 11 16 3 Oct 23 22 19 14 19 3 Nov 24 23 20 9 22 2 Dec 23 22 18 12 22 3 1991 Jan 22 21 19 11 21 6 Feb 23 23 18 8 25 3 Mar 25 23 19 8 23 2 Apr 23 21 19 8 26 3 May 24 21 17 8 22 8 Jun 26 22 18 8 23 3 Jul 25 20 18 9 25 3 Aug 26 20 17 9 26 2 Sep 27 21 17 8 24 3 Oct 26 20 16 7 28 3 Nov 26 20 15 8 29 2 Dec 28 19 15 9 27 2 1992 Jan 28 21 15 7 27 2 Feb 27 20 15 7 29 2 Mar 29 21 14 7 27 2 Apr 30 19 13 7 29 2 May 31 19 12 10 26 2 --- -- -- -- -- -- - Nov 25 16 16 5 36 2 Dec 26 17 15 6 34 2 1993 Jan 27 17 16 6 32 2 Feb 26 17 17 5 33 2 Mar 26 17 16 5 34 2 Apr 25 16 17 5 34 3 May 26 17 17 5 31 4 Jun 24 17 17 5 32 5 Jul 24 17 18 5 29 7 Aug 26 17 19 5 27 6 Sep 24 17 18 6 29 6 Oct 23 17 17 5 30 8 Nov 24 17 17 5 31 6 Dec 24 17 16 5 29 9 1994 Jan 23 17 16 6 31 7 Feb 23 17 16 6 31 7 Mar 23 17 14 5 31 10 Apr 22 18 14 5 33 8 May 22 18 13 5 32 10 Jun 22 18 14 5 31 10 Jul 21 19 15 5 30 10 Aug 23 19 14 6 32 6 Sep 22 19 14 5 33 7 Oct 22 18 13 5 35 7 Nov 21 18 12 5 37 7 Dec 22 17 11 6 39 5 1995 Jan 21 18 11 5 39 6 Feb 19 16 9 5 41 10 Mar 17 16 9 5 45 8 Apr 16 15 8 5 49 7 Percentage of Bytes File Networked Inter- Name Other Non- Exchange Mail active Lookup TCP/UDP TCP/UDP Services Services 1990 Oct 45 27 7 9 11 1 Nov 46 28 7 5 13 1 Dec 45 26 7 7 13 2 1991 Jan 43 26 7 6 13 5 Feb 44 27 7 4 15 3 Mar 47 27 7 4 14 1 Apr 47 26 7 4 14 2 May 45 24 6 4 13 8 Jun 50 25 6 4 14 1 Jul 48 23 6 5 16 2 Aug 49 22 6 5 17 1 Sep 50 24 6 4 15 1 Oct 48 23 6 4 18 1 Nov 48 23 6 4 18 1 Dec 51 22 5 4 17 1 1992 Jan 50 23 5 4 17 1 Feb 50 22 6 4 17 1 Mar 52 22 5 4 16 1 Apr 52 20 5 3 19 1 May 53 20 4 5 17 1 --- -- -- - - -- - Nov 46 18 6 2 27 1 Dec 47 18 6 3 25 1 1993 Jan 48 18 6 3 24 1 Feb 47 19 7 3 23 1 Mar 46 18 6 3 26 1 Apr 45 17 6 3 26 3 May 45 18 6 3 24 4 Jun 44 18 6 2 25 5 Jul 43 18 6 3 22 8 Aug 44 18 7 2 21 8 Sep 42 18 7 3 22 8 Oct 39 17 6 2 23 13 Nov 42 18 7 2 24 7 Dec 42 17 6 2 24 9 1994 Jan 42 18 6 3 25 6 Feb 40 18 6 3 25 8 Mar 38 17 5 3 25 12 Apr 37 18 5 3 27 10 May 37 18 5 3 27 10 Jun 36 18 5 3 28 10 Jul 34 18 5 2 27 14 Aug 36 18 5 3 31 7 Sep 33 18 5 3 32 9 Oct 34 18 5 2 33 8 Nov 32 17 5 3 36 7 Dec 32 17 4 3 39 5 1995 Jan 31 17 4 2 40 6 Feb 28 15 4 2 41 10 Mar 25 14 3 2 46 10 Apr 22 14 3 2 51 8 The categories above are defined as follows: File exchange ftp: data and control (tcp ports 20, 21) Networked mail smtp, nntp, vmnet, uucp (tcp ports 25, 119, 175, 540) Interactive telnet, finger, who, login (tcp ports 23, 79, 513, udp port 513) Name lookup domain name service (udp port 53, tcp port 53) Other TCP/UDP services all tcp/udp ports not included above (e.g. irc, talk, X-windows, appletalk) Non-TCP/UDP services Internet Protocols other than tcp or udp (e.g. icmp, igmp, egp, hmp, ax.25, etc.) More detailed information is available in the ports files in the yearly subdirectories. For example, detailed information about March '93 usage can be found via anonymous FTP to nic.merit.edu in the file nsfnet/statistics/1993/nsf-9303.ports. NOTES: October, 1990: Distribution by bytes is now available. September, 1991: Begin using sampling method to collect statistics. November, 1991: Begin migrating production traffic to T3 backbone. Late May, 1992: Majority of traffic now moved to T3 backbone. Jun-Oct, 1992: No information available for either T1 or T3 backbones. November, 1992: Beginning with November '92, all numbers reflect T3 backbone traffic. April 30, 1995: The NSFNET Backbone Service successfully transitions to the new NAP architecture. The end of the NSFNET project marks the end of collection of this data.