TO IMPLEMENT SELECTIVE REPEAT ARQ PROTOCOL

TO IMPLEMENT SELECTIVE REPEAT ARQ PROTOCOL

import java.applet.*;

import java.awt.*;

public class SELECTIVE_REPEAT extends Applet {

    public void init()

    {

    }

public void paint(Graphics g)

    {

    g.drawString("Sender",50,40);

    g.drawString("Receiver",325,40);

    g.drawRect(40,20,60,30);//seder

    g.drawLine(70,50,70,200);//sender line

    g.drawRect(320,20,60,30);//Receiver

    g.drawLine(350,50,350,200);//receiver line

    /*Line for Frame 0*/

    g.drawLine(70,60,350,60 );

    g.drawLine(350,60,70,100);

/*Line for Frame 1*/

    g.drawLine(70,100,350,100 );

    g.drawLine(350,100,70,140);

/*Line for Frame 2*/

    g.drawLine(70,140,350,140 );

    g.drawLine(350,140,70,180);

/*Line for Frame 3*/

    g.drawLine(70,180,350,180 );

   

    g.drawString("Frame 0",190,60);

    g.drawString("Frame 1",190,100);

    g.drawString("Frame 2",190,140);

    g.drawString("Frame 3",190,180);

    g.drawString("ACK 0",100,90);

    g.drawString("ACK 1",100,130);

    g.drawString("ACK 2",100,170);

// sender frames

    g.drawRect(5,55,15,15);

    g.drawRect(20,55,15,15);

    g.drawRect(35,55,15,15);

    g.drawRect(50,55,15,15);

    g.drawRect(5,95,15,15);

    g.drawRect(20,95,15,15);

    g.drawRect(35,95,15,15);

    g.drawRect(50,95,15,15);

    g.drawRect(5,135,15,15);

    g.drawRect(20,135,15,15);

    g.drawRect(35,135,15,15);

    g.drawRect(50,135,15,15);

    g.drawRect(5,175,15,15);

    g.drawRect(20,175,15,15);

    g.drawRect(35,175,15,15);

    g.drawRect(50,175,15,15);

//Receiver Frames

    g.drawRect(355,55,15,15);

    g.drawRect(370,55,15,15);

    g.drawRect(385,55,15,15);

    g.drawRect(400,55,15,15);

    g.drawRect(355,95,15,15);

    g.drawRect(370,95,15,15);

    g.drawRect(385,95,15,15);

    g.drawRect(400,95,15,15);

    g.drawRect(355,135,15,15);

    g.drawRect(370,135,15,15);

    g.drawRect(385,135,15,15);

    g.drawRect(400,135,15,15);

    g.drawRect(355,175,15,15);

    g.drawRect(370,175,15,15);

    g.drawRect(385,175,15,15);

    g.drawRect(400,175,15,15);

    g.drawString("0",9,67);

    g.drawString("1",24,67);

    g.drawString("2",39,67);

    g.drawString("3",54,67);

    g.drawString("0",9,107);

    g.drawString("1",24,107);

    g.drawString("2",39,107);

    g.drawString("3",54,107);

    g.drawString("0",9,147);

    g.drawString("1",24,147);

    g.drawString("2",39,147);

    g.drawString("3",54,147);

    g.drawString("0",9,187);

    g.drawString("1",24,187);

    g.drawString("2",39,187);

    g.drawString("3",54,187);

    //Receiver Entry

    g.drawString("0",359,67);

    g.drawString("1",374,67);

    g.drawString("2",389,67);

    g.drawString("3",404,67);

    g.drawString("0",359,107);

    g.drawString("1",374,107);

    g.drawString("2",389,107);

    g.drawString("3",404,107);

    g.drawString("0",359,147);

    g.drawString("1",374,147);

    g.drawString("2",389,147);

    g.drawString("3",404,147);

    g.drawString("0",359,187);

    g.drawString("1",374,187);

    g.drawString("2",389,187);

    g.drawString("3",404,187);

    g.drawString("S,Sf",5,45);

    g.drawString("Sl",20,85);

    g.drawString("Rf,Rl",404,205);

   

    }

}

--------------------------OUTPUT-------------------------

Assuming Size of the Frame is 2