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TCP and UDP Ports
Network + TCP and UDP Ports
20
Computer Networking
Professional
04/09/2011
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Term
What is a non-ephemeral port?
 Definition
A port with a permanent port number
Term
What is an ephemeral port?
 Definition
A port with temporary port numbers determined in real time by the client workstation
Term
Port numbers are for __________ not _________.
 Definition
Communication; Security
Term
Service port numbers need to be __________.
 Definition
Well known
Term
True or false: TCP port numbers are the same as UDP port numbers.
 Definition
False
Term
What port does FTP (data) use?
 Definition
TCP/20
Term
What port does FTP (control) use?
 Definition
TCP/21
Term
What port does SSH use?
 Definition
TCP/22
Term
What port does Telnet use?
 Definition
TCP/23
Term
What port does SMTP use?
 Definition
TCP/25
Term
What port does DNS use?
 Definition
TCP/53
Term
What port does HTTP use?
 Definition
TCP/80
Term
What port does POP3 use?
 Definition
TCP/110
Term
What port does IMAP4 use?
 Definition
TCP/143
Term
What port does HTTPS use?
 Definition
TCP 443
Term
What port does DNS (queries) use?
 Definition
UDP/53
Term
What port does BOOTP and DHCP use?
 Definition
UDP/67
Term
What port does TFTP use?
 Definition
UDP/69
Term
What port does NTP use?
 Definition
UDP/123
Term
What port does SNMP use?
 Definition
UDP/161
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