hdlc protocol
hdlc protocol
hdlc protocol
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FLOW CONTROL<br />
The flow control is used to regulate the information flow between stations.<br />
✔<br />
The mechanism used is a window.<br />
✔<br />
A station can send up to W information frames before receiving any<br />
acknowledgment.<br />
✔<br />
The window is closed if the station has sent W frames and did not receive any<br />
acknowledgment.<br />
✔<br />
A station cannot send other information frames if its window is closed.<br />
✔<br />
The receiver can acknowledge one, several, or all the information frames<br />
previously received.<br />
✔<br />
When a station acknowledges some informations frames, it opens more or less the<br />
window of its peer.<br />
GET/INT/LOR/RIP 26 of 33 October 15, 2007
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