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TCP Ports
CompTIA Network+ TCP Ports
12
Computer Networking
Professional
03/14/2012
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Cards

Term
FTP
 Definition
20, 21

20 is considered the data port, and 21 is considered the control port. In
practical use, FTP connections use port 21. Port 20 is rarely used in modern
implementations.
Term
SSH
 Definition
22
Term
Telnet
 Definition
23
Term
SMTP
 Definition
25
Term
DNS
 Definition
53
Term
HTTP
 Definition
80
Term
POP3
 Definition
110
Term
NNTP
 Definition
119
Term
NTP
 Definition
123
Term
IMAP4
 Definition
143
Term
HTTPS
 Definition
443
Term
RDP
 Definition
3389
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