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Where are TCP and UDP protocols used?

TCP/IP is a communication protocol for computers connected to the Internet. TCP/IP refers to the transmission control protocol/internet protocol. TCP protocol is used in connection-oriented situations.

UDP is a connectionless transport layer protocol in the ISO reference model, which provides simple and unreliable transaction-oriented information transmission services. UDP protocol is basically the interface between IP protocol and upper layer protocol. UDP protocol is suitable for ports to distinguish multiple applications running on the same device.

TCP protocol is used in connection-oriented occasions, while UDP protocol is used in connection-oriented occasions.