MOHANDAS COLLEGE OF ENGINEERING AND TECHNOLOGY

Fifth Semester MCA University Lab Exam– June 2012  30/6/2012      

                                                                                                                                                                                                               COMPUTER NETWORKS LAB

Date	Time	Reg. No	No. of Students
4/6/2012	9.00am-12.00pm	901-915	15
	12.00pm-3.00pm	916-928,948	14

WEB APPLICATION DEVELOPMENT LAB

Date	Time	Reg. No	No. of students
5/6/2012	9.00am-12.00pm	901-915	15
	12.00pm-3.00pm	916-928	13

                                                                                                                                     

     

  Internal Examiners:  Saritha R.M., Jitha Thankachi B.J.                            HOD: Dr. K. Sivaraman

VIVA Topics for Computer Networks

Sample Viva Voice Topics for Computer Networks Lab Exam

1.       Socket functions with arguments(Bind, Listen, Accecpt, Socket, Connect etc)

2.       INADDR_ANY

3.       Loop back IP

4.       AF_INET,PF_INET

5.       SOCK_STREAM, SOCK_DGRAM

6.       Struct sockaddr_in

7.       inet_addr()

8.       setsockopt()

9.       TCP & UDP

10.   Sliding Window

11.   Bit Stuffing

12.   Tunneling

13.   Fragmentation

14.   Types of Fragmentation

15.   Mobile Adhoc Network

16.   Router and Switch

17.   Switch & Hub

18.   Bridges , Types

19.   Static Routing

20.   Dynamic Routing

21.   Link State Packet

22.   Internetworking

23.   Layers of OSI Model and its functions

24.   TCP & OSI Model

25.   Protocol

26.   LAN,MAN,WAN,PAN,SAN

27.   Uncast, Multicast, Broadcast

28.   Circuit Switching & Packet Switching

29.   RSVP

30.   Leaky Bucket

31.   Token Bucket

32.   Congestion Control

33.   Traffic Shaping

34.   Flooding

35.   IPV4 & IPV6

36.   Structure of Class A,B,C,D

37.   Range of IP Address

38.   DNS

39.   DHCP

40.   MIME

41.   SMTP

42.   ARP

43.   NAT

44.   PDU

45.   CSMACD

46.   ALOHA(Pure & Slotted)

47.   Gethostbyname()

48.   Getservbyname()

49.   Getprotobyname()

50.   htonl(),htons(),ntohl(),ntohs()

lab exam schedule

Hi,
Your lab exam to be conducted on 4th and 5th June .
     4th Monday  CN Lab for all
     5th Tuesday  WAD Lab for all
Regarding CN Lab you must know how to connect two processes running on two different machines, how to find the IP Address of a machine, ping etc, all socket functions, theory of computer networks. i have given some sample viva questions to bijin, he will mail that to all of u. we have not implemented multicasting, if time permits we will try it. we have marks( minimum) for connection establishment in CN and Data base connectivity in WAD lab. but it doesn't mean that you will get pass based on that, Just Being a final year exam don't think that they will give you pass marks, if you are performing poorly......................

NB: Be thorough on the experiments in the record book

program to find time waited by client to get result

Client program to send a number to server and check whether it is prime or not. client calculates time taken .

#include<arpa/inet.h>

#include<sys/time.h>

//#include "unp.h"

#include<time.h>

#include<stdio.h>

#include<stdlib.h>

main(int argc,char *argv[])

{

        int sock,ret,z,x,n;

        struct sockaddr_in obj;

        struct timeval tv2,tv1;

        static char str[30],str2[30];

        char *ptr,*ptr2;

        char b[50];

        int totalT;

        obj.sin_family=AF_INET;

        obj.sin_port=atoi(argv[1]);

        obj.sin_addr.s_addr=inet_addr("172.16.6.79");//INADDR_ANY;

             sock=socket(AF_INET,SOCK_DGRAM,0);

                printf("eneter the number");

                scanf("%d",&n);

                gettimeofday(&tv1,NULL);

                ret=sendto(sock,&n,sizeof(n),0,(struct sockaddr*)&obj,sizeof(obj));

                int recv_count=0;

                printf("\n the response form sernver is");

                ret=recvfrom(sock,b,sizeof(b),0,(struct sockaddr*)&obj,sizeof(obj));

                recv_count++;

                gettimeofday(&tv2,NULL);

                totalT=(tv2.tv_sec-tv1.tv_sec)+(tv2.tv_usec-tv1.tv_usec);

                printf("\n response %s",b);

                printf("recv_count= %d and time taken=%ld microseconds \n",recv_count,totalT);

                close(sock);

}

cn lab exam

Hi,
      CN & WAD Labs scheduled to be on June 4,5,6.

      i am posting some previous  university lab questions on CN.

1.      A list of E-Mail addresses is store in the server. Send one email id from the client to server and verify whether this id is present in the list or not. True or False answer should be returned by the server. Use UDP connection

2. The client program should accept at least one line of text, from keyboard as a message and add an ‘X’ before the message if it contains two consecutive ‘e’s. Send this message to the Server and get a reply indicating that the server has received the message correctly after removing the additional character inserted. Display the corrected message in the Client machine.

3. The Client has to send a given message to the Server. Client has to add a flag character at the beginning and the end of the message. A suitable flag character may be chosen. The Server has to strip off the flag characters and has to send the original message back.

4. A message has to be sent to the Server. A coding has to be used to the message. Instead of one alphabet the next one in the alphabet is used. The server has to decide it and sent the original message back to the Client.

5. Establish UDP connection with the server. Send a string to the Server. Server will append another string to the received string. The new string will be sent back to the Client. The client ahs to calculate the length of the string appended by the server and display it.

6. Establish TCP connection with the server and send an integer number to the Server. Get the factorial of this number calculated by the Server. Get the result and broadcast the answer to all the nodes connected to the network.

7. Establish UDP connection to the server. Send a number to the Server. Calculate the square of the number in the Server and get the result from the Server. Find out the time between the sending of the number and receiving of the answer.

8. A list of Forbidden IP Addresses is stored in the Server. Client has to send an IP Address to that server and check if it is valid. If valid, the client has to send a hello message to the machine with this IP Address.

9. Client has to insert a character ‘X’ before two consecutive 1’s in the message. Send this message to the Server. Get a reply to indicate that the server has received the message correctly after removing the additional character inserted.

10. Establish TCP connection between two machines. Fetch a file using FTP and display it in the given folder.

11. Get two files using FTP from two different machines. Use TCP connection. Both the files should be stored in the specified directory in the client.

CN LAB EXAM

CN Lab Exam dates are announced.

June 4,5,6.

Time table, Sample questions, Whether to do in single system or 2, all these details will be known to you on Thursday . During the vacation time, some of us done the broadcasting program in 2 systems.