| TCP ports are not like the ports on your computer into which
you would plug a device. These ports allow specific communications between
computers, applications and programs. A port is how a program, computer,
application communicates with each other using TCP(Transmission Control
Protocol). For further information in more
detail please visit Microsoft Ports Assignments and Protocol Numbers.
There are 65535 ports on your computer system. They are broken down into 3 catagories.
- Well Known Ports: Range from 0 through 1023 and are assigned by the IANA (Internet Assigned Number Authority). These are the most commonly used ports. For example port 80, which is the http port, is used to connect to other web servers on the Internet and port 110 is POP3 which handles your incoming e-mail.
- Registered Ports: Range from 1024 through 49151 are listed by the IANA. On most computer systems these ports can be used through normal user processes or executable programs by the computer user.
- Dynamic and/or Private Ports: Range from 49152 through 65535.
For a complete list of all the TCP/UDP ports please visit Iana Port numbers or Network Ice Port Knowledgebase.
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