B.E. (E & TC) COMPUTER NETWORK (2008 Pattern) (Sem. -1)
Time :3 Hours] [Max. Marks :100
Instructions to the candidates:-
1) Answer any three questions from each section.
2) Answers to the two sections should be written in separate answer books.
3) Neat diagrams must be drawn wherever necessary.
4) Figures to the right indicate full marks.
5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed.
6) Assume suitable data, if necessary.
SECTION – I
QIA a) Draw the neat diagram of OSI model and explain in brief the function of each layer in it. 
b) Explain UTP cable with reference to following. 
i) Categories ii) Connecters
i) Performance iv) Applications
Q2) a) State 8 explain four basic network topologies and write advantages of each type. 
b) Compare between circuit switching and packet switching. 
c) State 8 explain the basic service primitives used in client-server model.
Draw the HDLC frame format 8 explain in detail the control field used in HDLC protocol for different frame types. . 
State 8 explain multiple access protocols in brief. 
State 8 explain in brief the functions associated with Data Link Layers in OSI model. 
What are the common standard Ethernet implementations? Explain. 
What is backbone network? What are its types? Explain in brief. 
Write short note on Application Adaptation Layer (AAL) in ATM. 
Draw and explain A TM Reference model. 
Explain the difference between Switch 8 Hub. 
SECTION – II
For a given Classless IP address, how will you extract network address 8 host address? Explain with suitable example. 
Compare between IPv4 and IPv6. 
Write short notes on: [W]
Explain different forwarding techniques used in computer network. 
What are the duties of Transport layer? List the services provided by Transport Layer to upper layers. Also explain how QoS is improved by Transport Layer. 
Compare between TCP and UDP. Under what circumstances you will use them? 
QI0) a) Draw the TCP segment format. Explain its various fields and their use.
b) Write a short note on congestion control. 
QII) a) What are the main responsibilities of Application Layer? Explain in brief.
b) Explain : FTP and Telnet protocol. 
Q12) a) Write short notes on : 
ii) Email System
iii) www 8 internet.
b) Write short note on Firewall.