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Understanding how flow control operates at the Transport layer
A quick overview of the Transport layer and its function:
- Reliable networking is used at the transport layer
- Reliable networking = using acknowledgements, sequencing, and flow control in the network.
- Segments and reassembles data into a data stream from the upper application layer and unites the information into the same data stream for further processing.
Flow Control
- Flow control prevents a sending host on one side of the connection from overflowing the buffers in the receiving host.
- an event that can result in data loss
- Reliable data transports and employs a connection oriented communications sessions between systems and the protocols involved, to ensure that the following will be achieved:
- Segments delivered are acknowledged back to the sender upon their reception.
- Any segments not acknowledged are re-transmitted.
- Segments are sequenced back into their proper order upon arrival at their destination.
- A manageable data flow is maintained in order to:
- avoid traffic congestion
- overloading
- data loss
- The purpose of flow control is to provide means for the receiver to be able to govern the out of data sent by the sender.
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