User manual

EE400-R GigaFast Ethernet.
P 44
Appendix A TCP/IP Well-Known Port
Any application or process that uses TCP for its transport is assigned a unique identification number
called a TCP port. TCP ports specify the path of communications between client and server applications.
These ports are numbered beginning with zero. Port numbers for client applications are dynamically
assi
g
ned b
y
the operatin
g
s
y
stem when there is a request for service. Port numbers for server
applications are pre-assi
g
ned b
y
the Internet Assi
g
ned Numbers Authorit
y
(
IANA
)
and do not chan
g
e,
The following is a short list of some well-known port numbers.
Table A-1 Well-Known TCP ports
Port No. Name (TCP) Description
20 FTP-DATA FTP(data)
21 FTP FTP(command)
23 TELNET Terminal Connection
25 SMTP SMTP
53 DOMAIN Name Domain Name Server
79 FINGER Fin
g
er
80 HTTP Web
110 POP3 POP3
113 AUTH Authentication Service
139 NETBIOS-SSN NETBIOS Session Service
1723 PPTP Point to Point Tunneling Protocol