Cisco 520-T1 Software Guide - Page 153
D, Common Port Assignments, Table D-1, TCP Port Numbers
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D A P P E N D I X Common Port Assignments OL-14210-01 Table D-1 lists currently assigned Transmission Control Protocol (TCP) port numbers. To the extent possible, the User Datagram Protocol (UDP) uses the same numbers. Table D-1 Port 0 1-4 5 7 9 11 13 15 17 19 20 21 23 25 37 39 42 43 49 53 67 68 69 TCP Port Numbers Keyword - - RJE ECHO DISCARD USERS DAYTIME NETSTAT QUOTE CHARGEN FTP-DATA FTP TELNET SMTP TIME RLP NAMESERVER NICNAME LOGIN DOMAIN BOOTPS BOOTPC TFTP Description Reserved Unassigned Remote job entry Echo Discard Active users Daytime Who is up or NETSTAT Quote of the day Character generator File Transfer Protocol (data) File Transfer Protocol Terminal connection Simple Mail Transport Protocol Time Resource Location Protocol Hostname server Who is Login Host Protocol Domain name server Bootstrap Protocol Server Bootstrap Protocol Client Trivial File Transfer Protocol Cisco Secure Router 520 Series Software Configuration Guide D-1