Computer Network 2019- MCA-RCA402 4th Sem AKTU

Printed Pages: 02 Sub Code: RCA402

Paper Id: 214422 Roll No. _____________________

MCA

(SEM IV) THEORY EXAMINATION 2017-18

COMPUTER NETWORK

Time: 3 Hours Total Marks: 70

Note: Attempt all Sections. If require any missing data; then choose suitably.

SECTION A

1. Attempt all questions in brief. 2 x 7 = 14

    a) What are the applications of computer network ?

    b) What is Shannon capacity for Noisy Channel ?

    c) Different between Baseband Transmission and Broadband Transmission.

    d) Distinguish between TCP and UDP.

    e) What is Gateway ?

    f) Define Fragmentation.

    g) Write about digital signature ?

SECTION B

2. Attempt any three of the following: 7 x 3 = 21

    a) What is Network ? Explain different types of Networks.

    b) What is cyclic code and explain Cyclic Redundancy Check (CRC) code ?

    c) What is IP addressing ? How would you design Class A, Class B and Class C of IP addresses ?

    d) Explain the TCP/IP reference model with neat diagram.

    e) Describe in details about the three way handshake protocol for connection establishment in TCP.

SECTION C

3. Attempt any one part of the following: 7 x 1 = 7

    a) What is transmission medium ? What are the different types of transmission medium ?

    b) What is multiplexing ? Define all Categories f multiplexing.

4. Attempt any one part of the following: 7 x 1 = 7

    a) Write short notes on :

        (i) SQNET

        (ii) ATM

        (iii) BLUETOOTH

    B) Discuss different standards of Ethernet

1.  

5. Attempt any one part of the following: 7 x 1 = 7

    a) Describe internetworking connecting devices in reference to layers.

    b) Define controlled access and list three protocols in this category.

6. Attempt any one part of the following: 7 x 1 = 7

    a) How is congestion controlled ? Explain in details the TCP congestion control.

    b) CB84000D001C001C is the content of a UDP header

         (i) What is the source port number ?

         (ii) What is the destination port number ?

         (iii) What is the length of the data ?

         (iv) What is the total length of the user datagram ?

7. Attempt any one part of the following: 7 x 1 = 7

    a) What is security goals ? Explain different types of Network Attacks.

    b) Describe in details about the following in Electronic mail.

        i. Message format

        ii. Message transfer

        iii. Mail reader

Thank You!