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Port Numbers Used by TCP & UDP
Well-known Port Number used by TCP & UDP
15
Computer Networking
Post-Graduate
07/14/2014

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Cards

Term
ftp-data
Definition
#20; TCP
- used for transmitting files between systems
Term
ftp
Definition
#21; TCP
- used by FTP-connected systems for exchanging commands and responses
Term
Ssh (Secure Shell)
Definition
#22; TCP & UDP
- used to securely log on to a computer from another computer on the same network and execute commands
Term
telnet
Definition
#23; TCP
- used to execute commands on network-connected systems
Term
Smtp (Simple Mail Transport Protocol)
Definition
#25; TCP
- used to send e-mail messages
Term
Domain
Definition
#53; TCP & UDP
- used to receive host name resolution requests from clients
Term
Bootps (Bootstrap Protocol & DHCP servers)
Definition
#67; TCP & UDP
- used to receive TCP/IP configuration requests from clients
Term
Bootpc (Bootstrap Protocol & DHCP clients)
Definition
#68; TCP and UDP
- used to send TCP/IP configuration requests to servers
Term
http
Definition
#80; TCP
- used by web servers to receive requests from client browsers
Term
pop3 (Post Office Protocol 3)
Definition
#110: TCP
used to retrieve e-mail requests from clients
Term
nntp (Network News Transfer Protocol)
Definition
#119; TCP & UDP
- used to post and distribute messages to and retrieve them from, Usenet servers on the internet
Term
ntp (Network time protocol)
Definition
#123; TCP & UDP
- used to exchange time signals for the purpose of synchronizing the clocks in the network computers
Term
imap (Internet Message Access Protocol version 4)
Definition
#143; TCP & UDP
- used by e-mail client programs to retrieve messages from a mail server
Term
snmp (Simple Network Management Protocol)
Definition
#161: TCP & UDP
- used by SNMP agents to transmit status information to a network management console
Term
https (Hypertext Transfer Protocol over TLS/SSL)
Definition
#443; TCP & UDP
- used by the web servers to receive encrypted requests from client browsers
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