📄 gobackn.htm
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H1 {font-family:Arial, sans-serif; color:#8989DB;
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<h1>Go-Back-N ARQ</h1>
<P>
This Java applet demonstrates the go-back-n automatic repeat request (ARQ)
mechanism of data link error control. Go-back-n ARQ is the most commonly
used form of error control based on sliding-window flow control. In this
method, a station may send a
series of frames sequentially numbered modulo some maximum value. While no
error occur, the destination will acknowledge incoming frames with a ACK. If the
destination station detects an error in a frame, it sends a negative
acknowledgment (NACK) for that frame. The destination station will discard that
frame and all future incoming frames until the frame in error correctly
received. When the source station receives a NACK, it must retransmit the frame
in error and all succeeding frames that were transmitted in the interim.
</P>
<P> </P>
<APPLET height=400 width=470 code=goBackN.class name=goBackN VIEWASTEXT>
<PARAM NAME="foreground" VALUE="FFFFFF">
<PARAM NAME="background" VALUE="008080">
<PARAM NAME="label" VALUE="This string was passed from the HTML host.">
</APPLET>
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