... I servizi di rete si posizionano sopra i protocolli che fanno uso di IP. ... Version: @(#)/etc/services 2.00 04/30/93 # # Author: Fred N. van Kempen, waltje@uwalt.nl.mugnet.org # tcpmux 1/ tcp # rfc-1078 echo 7/ tcp echo 7/ udp discard 9/ tcp sink null discard 9/ udp sink null systat 11/ tcp users daytime 13/ tcp daytime 13/ udp netstat 15/ tcp qotd 17/ tcp quote chargen 19/ tcp ttytst source chargen 19/ udp ttytst source ftp-data 20/ tcp ftp 21/ tcp telnet 23/ tcp smtp 25/ ...