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Definition: port


(1) (noun) A number that identifies applications and services in a TCP/IP network. See TCP/IP port, port 80, well-known port and opening a port.

(2) (noun) A physical socket (jack) that accepts a plug. For example, cables are plugged into Ethernet ports, and cables and flash drives are plugged into USB ports. See jack, plugs and sockets, legacy port, port speed and line card.

(3) (verb) To translate software to run in a different computer environment. For example, "port the application to Unix" means make the necessary changes in the program's source code so that it can be compiled and run under the Unix operating system.

(4) (verb) To switch a telephone number from one telephone carrier to another. See LNP.