83. STOP & WAIT PROTOCOL USING SOCKETS IN JAVA

//SENDER PROGRAM

import java.io.*;

import java.net.*;

public class Sender{

Socket sender;

ObjectOutputStream out;

ObjectInputStream in;

String packet,ack,str, msg;

int n,i=0,sequence=0;

Sender(){}

public void run(){

 try{

 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.println("Waiting for Connection....");

 sender = new Socket("localhost",2004);

sequence=0;

82. JAVA PROGRAM FOR SLIDING WINDOW PROTOCOL

//SENDER PROGRAM

import java.net.*;

import java.io.*;

import java.rmi.*;

public class slidsender

{

public static void main(String a[])throws Exception

{

ServerSocket ser=new ServerSocket(10);

Socket s=ser.accept();

DataInputStream in=new DataInputStream(System.in);

DataInputStream in1=new DataInputStream(s.getInputStream());

String sbuff[]=new String[8];

PrintStream p;

int sptr=0,sws=8,nf,ano,i;

String ch;

do

{

p=new PrintStream(s.getOutputStream());

System.out.print("Enter the no. of frames : ");

nf=Integer.parseInt(in.readLine());

p.println(nf);

if(nf<=sws-1)

{

81. TCP/UDP CLIENT SERVER PROGRAM IN JAVA

//CLEINT PROGRAM

import java.io.*;

import java.net.*;

import java.lang.*;

class client

{

public static void main(String a[])throws IOException

{

Socket s=new Socket("LocalHost",8000);

DataInputStream in=new DataInputStream(s.getInputStream());

DataInputStream inn=new DataInputStream(System.in);

PrintStream dos=new PrintStream(s.getOutputStream());

while(true)

{

String str=in.readLine();

System.out.println("msg received:"+str);

if(str.equals("end"))

{

80. JAVA PROGRAM FOR HAMMING CODE

//HAMMING CODE

import java.util.*;

import java.lang.*;

class Hamming

{

            public static void main(String args[])

            {

                        int i=0,j,d=0,sum=0;

                        int a[]=new int[7];

                        int b[]=new int[11];

                        int c[]=new int[11];

                        int p[]=new int[4];

                        Scanner sr=new Scanner(System.in);

                        System.out.println("Enter the data code:");

                        for(i=0;i<7;i++)

                        {

                                    a[i]=sr.nextInt();

                        }

79. JAVA PROGRAM FOR CYCLIC REDUNDANCY CHECK

//CYCLIC REDUNDANCY CHECK

import java.io.*;

import java.lang.*;

public class crc

{

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

{

int f[]=new int[25];

int gen[]=new int[10];

int rem[]=new int[10];

int flen,glen,rlen,i,j;

int p,sum,iframe,igen,irem;

String data;