Generally, flow-control is a mechanics allowing the receiving party of a connection to control the rate of the sending party. You may see many different implementations of flow-control technologies at different levels of OSI model (e.g. XON/XOFF for RS232, TCP sliding window, B2B credits for Fibre Channel, FECN/BECN for Frame-Relay, ICMP source-quench message, etc). Flow-Control allows for explicit feedback loop and theoretically implementing loss-less networks that avoid congestion. For the... Read More

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