List of TCP and UDP port numbers - Wikipedia 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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Ports in Networking - GeeksforGeeks Ports work at the Transport layer, using TCP and UDP to send and receive data between devices They enable multiple applications to use the network simultaneously without interference