Flow control is a mechanism used to control the rate of data transfer between two or more nodes in a communication network. Flow control is used to prevent fast senders from overwhelming slower receivers. This can cause data overflow and data loss. Flow control also enables slower devices to communicate with faster long weld neck. This can be done by using control lines in a data communication interface. These control lines include CTS (clear to send) and RTRS (request to send) commands.
Flow control can be active or passive. In passive flow control, the sender sends data to the receiver, but only waits for an acknowledgement. Once an acknowledgement is received, the sender sends the next frame. This type of flow control is also called stop-and-wait flow control. It is the easiest type of flow control.
In active flow control, the sender sends data at a speed greater than the receiver’s processing speed. Normally, the sender uses the XON/XOFF protocol to send data. When the receiver is ready to process the data, the sender will send on, but only if the receiver sends an ACK. This type of flow control is also referred to as software flow elite 6×01.
The receiver sends an ACK after it receives a frame. When the receiver sends the ACK, the sender shifts the window to a corresponding sequence number. The sender sends the next frame when the receiver receives the ACK. Depending on the type of flow control, a sender may need to inform the receiver when data has exceeded its capacity. A buffer is used to store data until the receiver can process it. If the buffer is overloaded, the data is retransmitted.
Another type of flow control is called feedback-based flow control. Flow control that is feedback-based allows the sender to send more data. This type of flow control also allows the sender to know how the receiver is processing the data. This type of flow control is more efficient than stop-and-wait.
Flow control can also be used to manage the flow of frames between two directly connected link-partners. It is used to avoid data overflow and to reduce dropped packets. Flow control is used in conjunction with a number of other protocols. It is used in half-duplex radio modem to computer interface. A link-partner A sends a Pause On frame when its receive buffer is nearly full. This is followed by a retransmission of the missing frame. The link-partner B then suspends transmission until a timeout threshold has been reached.
A third type of flow control is called sliding window flow control. In this type of flow control, the receiver assumes that no communication occurs until the data transfer is complete. This type of flow control is used when traffic flow is based on window size. This type of flow control can be used in a wide variety of devices. The size of the window can be controlled via client configuration.
The Xon/Xoff protocol is also used in flow control. It is used to send data asynchronously, such as over serial connections. This type of flow control is usually referred to as software flow control.https://www.youtube.com/embed/ReQiSK8W3Ag