UDP
UDP is an abbreviation for User Datagram Protocol. UDP is a connectionless protocol that is ported to IP. Unlike TCP it does not require an acknowledgement to its packets to make sure that they arrived at their destination. It is used primarily for broadcasting messages over a network. There are 65,536 UDP ports. The UDP port is specified by 16 bits in an IP packet.
TCP
TCP is an abbreviation for Transmission Control Protocol. TCP is a connection oriented protocol in the TCP/IP protocol suite. TCP is the main protocol on an IP network. TCP is used to establish a connection between two IP hosts. It guarantees the delivery of packets and also guarantees that the packets are received in the same order that they were sent. There are 65,536 TCP ports. The TCP port is specified by 16 bits in an IP packet.
TCP/UDP Port List
Service Name |
UDP Port |
TCP Port |
FTP-Data |
|
20 |
FTP (File Transfer Protocol) |
|
21 |
Telnet |
|
23 |
SMTP (Simple Mail Transfer Protocol) |
|
25 |
WINS (Windows Internet Naming Service) |
42 |
42 |
DNS (Domain Naming Service) |
53 |
53 |
Bootstrap Protocol Server (DHCPS) |
67 |
|
Bootstrap Protocol Client (DHCPC) |
68 |
|
TFTP (Trivial File Transfer Protocol) |
69 |
|
HTTP (HyperText Transport Protocol) |
|
80 |
Kerberos Authentication Service |
88 |
88 |
POP2 (Post Office Protocol - Version 2) |
|
109 |
POP3 (Post Office Protocol - Version 3) |
|
110 |
Client/Server Communication |
|
135 |
NetBIOS Name Service |
137 |
137 |
NetBIOS Datagram Service |
138 |
|
NetBIOS Session Service |
|
139 |
IMAP (Internet Message Access Protocol) |
|
143 |
SNMP (Simple Network Management Protocol) |
161 |
|
SNMP Trap |
162 |
|
LDAP (Lightweight Directory Access Protocol) |
|
389 |
HTTPS (SSL Secure Socket Layer) |
443 |
443 |
Microsoft Directory Services |
445 |
445 |
Microsoft-SQL-Server |
1433 |
1433 |
Microsoft-SQL-Server Monitor |
1434 |
1434 |
L2TP (Layer Two Tunneling Protocol) |
1701 |
|
PPTP (Point-to-point tunnelling protocol) |
|
1723 |
RADIUS authentication protocol |
1812 |
|
RADIUS accounting protocol |
1813 |
|
NFS server |
2049 |
|
MYSQL |
|
3306 |
Terminal Services |
|
3389 |
PC-Anywhere Data |
|
5631 |
PC-Anywhere Statistics |
|
5632 |
VNC Web Access (Virtual Network Computing) |
|
5800 |
VNC (Virtual Network Computing) |
|
5900 |