Deemed University 2011 B.Tech Information Technology University: Lingayas University Term: V Title of the : Computer Networks - Question Paper

Roll No. ..

 

Lingayas University

B.Tech. 2^nd Year (Term V)

Examination Feb 2011

Computer Networks (IT - 202)

 

[Time: 3 Hours] [Max. Marks: 100]

 

Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.

 

Note: Attempt five questions in all. All questions carry equal marks. Question no. 1 is compulsory. Select two questions from Section B and two questions from Section C.

Section A

Q-1. Part - A

Select the correct answer of the following multiple choice questions. (10x1=10)

(i) Transport layer is .. the data link layer.

(a) Above (b) Below

(c) At the same layer as (d) Completely dependent on

(ii) is more suitable for computer communication.

(a) Circuit switching (b) Packet switching

(c) Message switching (d) None

(iii) . helps Ethernet recover from simultaneous transmission causing errors.

(a) CSMA/CD (b) CD

(c) CSMA (d) Collision

(iv) The address field in Frame Relay contains . octates.

(a) 3 6 (b) 1 3

(c) 2 4 (d) 1 4

(v) The . ATM layer is used for protocol transformations.

(a) Physical (b) ATM

(c) AAL (d) Data link

(vi) A can understand multiple network protocols.

(a) Repeater (b) Bridge

(c) Router (d) Gateway

(vii) ARP is a part of the .

(a) Physical layer (b) Application layer

(c) Transport layer (d) Internet layer

(viii) The maximum number of class B networks is

(a) 6480 (b) 12808

(c) 25610 (d) 16384

(ix) When a single packet reaches destination twice it should be handled by

(a) Sequence Control (b) Error control

(c) Loss control (d) Duplication control

(x) Combination of . and makes a socket.

(a) TCP address, IP address (b) IP address, UDP

(c) IP address port no. (d) IP address, physical

 

Part B

 

(a) Describe IP version 6. (5)

(b) Write short note on SMTP. (5)

 

Section B

 

Q-2. (a) Explain the evolution of Internet.

(b) Describe the various network topologies. (2x10=20)

 

Q-3. (a) What are the different types of networks? Explain in detail.

(b) Explain the functions of each layer of OSI model with the help of a diagram. (2x10=20)

 

Q-4. (a) Differentiate between TCP / IP and OSI model. (5)

(b) What is domain name system? Why is it required? (5)

(c) What are IP addresses? Explain different IP address classes and the need of subnet addressing. (10)

 

Section C

 

Q-5. (a) Explain token passing mechanism. (5)

(b) What is a LAN? Explain its features & briefly explain IEEE 802 LAN standards. (10)

(c) Write short notes on:

(i) Bridges

(ii) Routers (5)

 

Q-6. (a) Explain the functioning of ATM. (10)

(b) Write short note on:

(i) DQDB

(ii) ICMP (10)

 

Q-7. (a) What is security management and its purpose? (5)

(b) What are proxy servers? Explain. (5)

(c) Write short note on Windows 2000. (5)

(d) What do you understand by quality of service? (5)

 

Q-8. (a) Differentiate between client side & server side programming. (5)

(b) Differentiate between socket and port. (5)

(c) Write a program showing the implementation of a socket. (10)