Lectures notes for 2010 - KTH

Common Used Simple Services
Name
TCP
port
UDP
port
RFC
Description
echo 7 7 862 server returns what the client sends
discard 9 9 863 server discards what the client sends
daytime 13 13 867 Server returns the time and date in a human readable format
chargen 19 19 864 TCP server sends a continual stream of character, until the connection is
terminated by the client. UDP server sends a datagradm containing a
random number of characters each time the client sends a datagram.
ftp-data 20 File Transfer Protocol (Data)
ftp 21 File Transfer Protocol (Control)
telnet 23 Virtual Terminal Protocol
smtp 25 Simple Mail Transfer Protocol
time 37 37 868 Server returns the time as a 32-bit binary number. This number is the
time in seconds since 1 Jan. 1990, UTC
Maguire Common Used Simple Services 1: 54 of 104
maguire@kth.se 2010.03.21 Internetworking/Internetteknik