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TCP/IP Transport Layer, Transmission Control Protocol, TCP, User Datagram Protocol, UDP

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The Transport layer includes two major protocols Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) at the Transport Layer help in data communication as explained below.

1) An interface for network applications to access the network.

2) Provides means accepting data from different applications and directing that data to the recipient application on the receiving device (Multiplexing). Same way, on the receiving device the data need to be directed to the correct application, for that data was meant for (De-multiplexing).

3) Error checking, flow control, and verification. Two major protocols at the Transport layer, Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), work differently to achieve these goals.
 
Transmission Control Protocol (TCP):  TCP is a reliable protocol. TCP provides extensive error control and flow control to ensure the successful delivery of data. TCP is called as a connection-oriented protocol.

User Datagram Protocol (UDP): UDP is not a reliable protocol. There is no error checking features for UDP and is designed for situations when extensive control features are not necessary. User Datagram Protocol (UDP) is called as a connectionless protocol.

Click the following link to see a comparison and difference between TCP and UDP.

In the coming lessons we will look deeper how these protocols work to achieve the goals listed above.

You have learned what is the function of Transport Layer in TCP/IP protocol suit and what are the major protocols at Transport Layer. The major protocols at Transport Layer are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Click "Next" to continue.

              Jajish Thomason Google+
Related Topics
Transmission Control Protocol (TCP) Transmission Control Protocol (TCP) Segment Header TCP Three-way Handshake Multiplexing and Demultiplexing using port numbers Transmission Control Block (TCB) TCP Sliding Window TCP Connection Termination User Datagram Protocol (UDP) Differences between TCP and UDP
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