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Common Port Numbers
Common port numbers used in IT networking
28
Computer Networking
Professional
05/08/2013

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Cards

Term
20 TCP
21 TCP
Definition
File Transfer Protocol (FTP)
Term
22 TCP and UDP
Definition
Secure Shell (SSH)
SSH File Transfer Protocol (SFTP)
Secure Copy (SCP)
Term
23 TCP
Definition
Telnet
Term
25 TCP
Definition
Simple Mail Transfer Protocol (SMTP)
Term
49 TCP and UDP
Definition
Terminal Access Controller Access-Control System (TACACS)
Term
*IP protocol number 50

(* Is not a port number, but an IP protocol number used with IPSec.)
Definition
Encapsulating Security Payload (ESP) (used with IPSec)
Term
*IP protocol number 51

(* Is not a port number, but an IP protocol number used with IPSec.)
Definition
Authenticating Header (AH) (used with IPSec)
Term
53 TCP and UDP
Definition
Domain Name Server (DNS)
Term
67 UDP
68 UDP
Definition
Dynamic Host Configuration Protocol (DHCP)
Term
69 UDP
Definition
Trivial File Transfer Protocol (TFTP)
Term
80 TCP
Definition
HyperText Transfer Protocol (HTTP)
Term
88 TCP
Definition
Kerberos
Term
110 TCP
Definition
Post Office Protocol (POP3)
Term
119 TCP
Definition
Network News Transport Protocol (NNTP)
Term
123 UDP
Definition
Network Time Protocol (NTP)
Term
135 TCP
137 and 138 TCP and UDP
139 TCP
Definition
Network Basic Input/Output System (NetBIOS)
Term
143 TCP and UDP
Definition
Internet Message Access Protocol (IMAP4)
Term
161 TCP and UDP
162 TCP and UDP
Definition
Simple Network Management Protocol (SNMP)
Term
389 TCP and UDP
Definition
Lightweight Directory Access Protocol (LDAP)
Term
443 TCP and UDP
Definition
HTTP with Secure Sockets Layer (SSL/TLS) (HTTPS)
Term
445 TCP
Definition
Windows 2000 CIFS/SMB (file access)
Term
500 UDP
Definition
Internet Key Exchange (IKE) (used with IPSec)
Term
636 TCP and UDP
Definition
Lightweight Directory Access Protocol over TLS/SSL (LDAPS)
Term
989 TCP and UDP
990 TCP and UDP
Definition
FTP Secure (FTPS or FTP over SSL/TLS)
Term
1701 UDP
Definition
Layer 2 Tunneling Protocol (L2TP)
Term
1723 TCP and UDP
Definition
Point-to-Point Tunneling Protocol (PPTP)
Term
1812 TCP and UDP
1813 TCP and UDP
Definition
Remote Authentication Dial In User Service (RADIUS)
Term
3389 TCP
Definition
Remote Desktop Protocol (RDP)
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