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Transport Layer Protocols: TCP and UDP
The Transport Layer in the TCP/IP suite provides two main protocols: the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).
TCP is a reliable, connection-oriented protocol that provides guaranteed delivery of data by establishing a virtual circuit between the source and destination hosts. It breaks data into segments and sends them across the network, retransmitting lost segments as necessary. TCP also provides flow control and congestion control mechanisms to prevent network congestion and ensure reliable delivery. TCP is used by applications that require high reliability, such as email, file transfer, and web browsing.
UDP, on the other hand, is a connectionless, unreliable protocol that does not provide any guarantees of delivery. It simply sends datagrams across the network, without establishing a virtual circuit or checking for errors or congestion. UDP is used by applications that require low overhead and speed, such as audio and video streaming, online gaming, and DNS queries.
The choice of TCP or UDP depends on the specific requirements of the application. If reliability and error checking are important, then TCP is the better choice. If speed and low overhead are more important, then UDP is the better choice.
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