| congestion control | flow control |
| Main theme of congestion control is to carry the offered traffic without any loss. | whereas flow control relates the point-to-point traffic between a fast sender and a slow receiver. |
| It is global issue involving Routers, hosts behavior. | It involves the behavior of hosts that is sender and receiver. |
| It uses the concept of store and forward. | It uses the signals acknowledgements and negative acknowledgements. |
| a store and forward n/w with 1 Mbps lines that uses 50 computers 25 wants to send data to the half(25) at a time causes congestion. | A N/w with a capacity of 1 Gbps, on which a superfast computer tries to transfer a file to a normal PC. we require flow control but not congestion control. |
