NSFNET T3 Usage by Service November 1992 Service Type % Packets % Bytes ============ ========= ======= File exchange 25 46 Networked mail 16 18 Interactive 16 6 Name lookup 5 2 Other TCP/UDP services 36 27 Non TCP/UDP services 2 1 --- --- 100 100 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 icmp, egp, etc. More detailed information is available for anonymous FTP from NIC.MERIT.EDU (the Merit NIC Services machine) in the file "t3-9211.ports" on the nsfnet/statistics/1992 directory.