Welcome to My Blog (Prashant Shinde).: 11/04/14

Tuesday, 4 November 2014

SIMULATE STOP AND WAIT ARQ

import java.applet.Applet;

import java.applet.*;

import java.awt.*;

public class STOP_WAIT extends Applet {

public void init()

{

}

public void paint(Graphics g)

{

g.drawString("Sender",25,40);

g.drawString("Receiver",325,40);

g.drawRect(20,20,60,30);//sender Rectangle

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

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

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

/*Line for Frame 0*/

g.drawLine(50,60,350,60 );

g.drawLine(350,60,50,100);

/*Line for Frame 1*/

g.drawLine(50,100,350,100 );

g.drawLine(350,100,50,140);

/*Line for Frame 2*/

g.drawLine(50,140,350,140 );

g.drawLine(350,140,50,180);

/*Line for Frame 3*/

g.drawLine(50,180,350,180 );

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);

g.drawString("S=0",25,65);

g.drawString("S=1",25,105);

g.drawString("S=0",25,145);

g.drawString("S=1",25,185);

g.drawString("R=0",360,65);

g.drawString("R=1",360,105);

g.drawString("R=0",360,145);

g.drawString("R=1",360,185);

}

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

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

To find class, subnet mask, first and last IP of the block in which given IP is present

/* To find class, subnet mask, first and last IP of the block in which given IP is present */

import java.io.*;

class Ipfind

{

public static void main(String[] args)throws IOException {

DataInputStream dis = new DataInputStream(System.in);

System.out.println("Enter IP Address (eg: 192.168.1.1)");

String ipAddr = dis.readLine();

String[] ipAddrParts=ipAddr.split("\\.");

String mask="";

int firstoctet = Integer.parseInt(ipAddrParts[0]);

if(firstoctet<=127)

{

mask = "255.0.0.0";

System.out.println("Class A IP Address");

System.out.println("The Subnet mask is: "+mask);

}

else if(firstoctet>=128 && firstoctet<=191)

{

mask = "255.255.0.0";

System.out.println("Class B IP Address");

System.out.println("The Subnet mask is: "+mask);

}

else if(firstoctet>=192 && firstoctet<=223)

{

mask = "255.255.255.0";

System.out.println("Class C IP Address");

System.out.println("The Subnet mask is: "+mask);

}

else if(firstoctet>=224 && firstoctet<=239)

{

mask = "255.0.0.0";

System.out.println("Class D IP Address; Used for multicasting");

}

else if(firstoctet>=240 && firstoctet<=254)

{

mask = "255.0.0.0";

System.out.println("Class D IP Address; Experimental Use");

}

String[] maskParts=mask.split("\\.");

String firstAddr="";

String lastAddr="";

for(int i=0;i<4;i++){

int x=Integer.parseInt(ipAddrParts[i]);

int y=Integer.parseInt(maskParts[i]);

int z=x&y;

int w=z|(y^255); //last ip = ipaddress && subnetmask + ~subnetmask

firstAddr+=z+".";

lastAddr+=w+".";

}

System.out.println("First IP of block: "+firstAddr);

System.out.println("Last IP of block: "+lastAddr);

}

OUTPUT:

C:\Documents and Settings\students\My Documents\Downloads>java Ipfind

Enter IP Address (eg: 192.168.1.1)

10.0.6.162

Class A IP Address

The Subnet mask is: 255.0.0.0

First IP of block: 10.0.0.0.

Last IP of block: 10.255.255.255.

PROGRAM FOR HAMMING CODE GENERATION AND DETECTION

/*PROGRAM FOR HAMMING CODE GENERATION AND DETECTION */

package program;

import java.util.*;

class code

{

Scanner sc=new Scanner(System.in);

int a[]=new int[10];

int d[]=new int[10];

int n,i,ch,j,x;

double r,r1;

void get()

{

System.out.println("\nEnter the Number of parity bits");

n=sc.nextInt();

r1=Math.pow(2,n);

x=(int)r1;

}

void generate()

{

System.out.println("Enter the Four bits");

for(i=0;i<4;i++)

a[i]=sc.nextInt();

d[7]=a[0];

d[6]=a[1];

d[5]=a[2];

d[3]=a[3];

d[1]=(d[3]+d[5]+d[7])%2;

d[2]=(d[3]+d[6]+d[7])%2;

d[4]=(d[5]+d[6]+d[7])%2;

}

void detect()

{

System.out.println("Enter the Seven bit Number");

for(i=x-1;i>=1;i--)

{

a[i]=sc.nextInt();

}

d[7]=a[7];

d[6]=a[6];

d[5]=a[5];

d[3]=a[3];

d[1]=(a[3]+a[5]+a[7])%2;

d[2]=(a[3]+a[6]+a[7])%2;

d[4]=(a[5]+a[6]+a[7])%2;

for(i=0;i<n;i++)

{

r=Math.pow(2,i);

j=(int)r;

if(a[j]==d[j])

{

System.out.println("No Error at "+j+ "Position\n");

}

if(a[j]!=d[j])

{

System.out.println("The Error Occured at "+j+ "Position\n");

}

void display()

{

for(i=x-1;i>=1;i--)

{

System.out.print( d[i]);

}

public class Hamming

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

int ch;

code c=new code();

{

System.out.println("\n1.Hamming code Generation\n2.Error Detection\n3.Exit\n");

ch=sc.nextInt();

switch(ch)

{

case 1:

c.get();

c.generate();

c.display();

break;

case 2:

c.get();

c.detect();

c.display();

break;

case 3:

}

}while(ch!=3);

}