NSFNET T1 Usage by Service
December 1991
Service Type % Packets % Bytes
============ ========= =======
File exchange 28 51
Networked mail 19 22
Interactive 15 5
Name lookup 9 4
Other TCP/UDP services 27 17
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
NIS.NSF.NET (the Merit/NSFNET Information Services machine)
in the file NSF91-12.PORTS on the NSFSTATS directory.
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