Anna University Chennai 2011-6th Sem B.E Electronics & Communication Engineering ./B.Tech , IL/ ,Electronics and Communication Engineering, EC 2352- COMPUTER NETWORKS REGULATION 2008 - Ques

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011,
Sixth Semester,
Electronics and Communication Engineering,
EC 2352- COMPUTER NETWORKS,
REGULATION 2008

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011 Sixth Semester Electronics and Communication Engineering

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EC 2352 COMPUTER NETWORKS 1

(Regulation 2008)

Time : Three hours    Maximum : 100 marks

Answer ALiffiestions

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PART A (lo|| 2 S20 nWks)'||

1.    List out the four basic Network

2.    Distinguish between ADSL and lipSL.

3.    Define flow control and error controll

4.    How is a repeater different from an amplifier?

5.    Find the class of each address

(a)    00000001 00001011 000Q1011 11101111

(b)    14.23.120.8

6.    Draw the general format of ICMP messages.

7.    Suppose a TCP connection is transferring a file of 5000 bytes. The first byte is numbered 10,001. What are the sequence numbers for each segment if data are sent in five segments, each carrying 1000 bytes?

8.    Mention the techniques used to improve QOS in process-to-process delivery.

W Jk_v

wj|y do we need POP3 or IMAP4 for E-mail?

Ifk,. Differentiate ciphertext and plaintext.

PART B (5 x 16 = 80 marks)

11. (a) Describe briefly the various layers and functions of OSI model and compare OSI Model with Internet model.    r'    (16)

Or

(b) Briefly explain the different types of packet switching techniques with suitable networks. Write each of its advantagetnddvaatages: (16)

12. (a) (i) What is CSMA/CD? How does it work? Distinguish between 1-persistent and non-persistent CSMA.    (8)

(ii) Explain in detail about the frame format and control field of HDLC.

(8)

(b) (i) Draw and explain the frame fdltoat ot Standard Ethernet. What are the physical media that Ethernet can rupver?    (8)

(ii) Briefly explain Che Bluetooth Technology. List out the applications

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and limitations WBfuetoith Technology.    (8)

13. (a) Explain the rious clasps of Internet (IPv4, IPv6) addressing with suitable exan||}.lfsf ^r '    (16)

(b) (i) Briefly explain IGMP message format and IGMP operation.

(ii) Tabulate the shortest path between all nodes for the following

(8)

11298

14. (a) (i) Draw the structure of TCP segment. Explain the features qt TCJW

(ii) What do you understand by 3-way Hand shake in TCP? Explain. ,

3)

Or

(b) (i) Explain congestion control with a suitable ex categories of congestion control.

(ii) Define QOS. Elaborate the char acteristicsol QOS.

15. (a) (i) Describe how SMTP protocol is used in E-mail

(ii) Illustrate the operation of FTP with a neat sketch

(8) (8)

3    11298

Attachment: anna-university-chennai-2011-b-e-electronics--amp--communication-engineering-12623-1.pdf

Earning:   Approval pending.