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This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for bidirectional traffic. TCP usually uses port numbers that match the services of the corresponding UDP implementations, if they exist, and vice versa.
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The Internet Community Ports Act (ICPA), created and advocated by The CP80 Foundation (aka "Clean Port 80"), is an approach to HTTP content filtering, leveraging Transmission Control Protocol ports to segregate content between "Community Ports" and "Open Ports."
In computer networking, a port or port number is a number assigned to uniquely identify a connection endpoint and to direct data to a specific service. At the software level, within an operating system , a port is a logical construct that identifies a specific process or a type of network service .
External hosts must know this port number and the address of the gateway to communicate with the network-internal service. Often, the port numbers of well-known Internet services, such as port number 80 for web services (HTTP), are used in port forwarding, so that common Internet services may be implemented on hosts within private networks.
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As an example, a web service may be made available on TCP port 80 on a device. TCP/80 is the standard port for HTTP and users would be able to access the content of that web server, the website, by directing their web browsers to that device where the user would be able to view the home page of the website. However, a web service may be opened ...