How does tcp achieve reliability, Computer Engineering

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How does TCP achieve reliability?

One of the most significant technologies is retransmission. While TCP stands data the sender compensates for packet loss through implementing a retransmission scheme. Both sides of the communication participate. While TCP receives data, this sends it acknowledgements back to the sender.

Whenever this sends data, TCP begins a timer. If the timer expires before an acknowledgement appears, the sender retransmits the data. The demonstrated figure shows retransmission.

885_TCP.png

TCP's retransmission scheme is the input to its success since this handles communication across an arbitrary Internet and permits multiple application programs to communicate simultaneously.


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