Jawaharlal Nehru Technological University Hyderabad 2005-2nd Sem B.E Computer Science COMPUTER NETWORKS III B.Techester Regular s, il/ set 2 - Question Paper

Code No: RR320503 Set No.2
III B.Tech. II Semester Regular Examinations, April/May 2005
COMPUTER NETWORKS
( Common to Computer Science & Engineering,Information
Technology,Electronics & Control Engineering,Computer Science & Systems
Engineering and Electronics & Computer Engineering)
Time: three hours
ans any 5 ques.
All ques. carry equal marks
********
Max Marks: 80
1. (a) Compare and contrast OSI and TCP/IP reference models.
(b) Write algorithm using data link layer primitives the simplex
protocol for a
noisy channel.[8+8]
2. (a) What is CSMA/CD protocol? Where is it used? Indicate the
various states
of the protocol.
(b) What is the binary count down protocol? Why is it
considered as collision
free protocol?[8+8]
3. What is distance vector algorithm? discuss its usage for the
subsequent subnet.
============
fig attached..see beneath
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What issues are associated with this algorithm? How are they
overcome?
(Make necessary assumptions)[8+8]

4. explain various congestion algorithms in datagram subnets.[16]
5. Draw the header structures of UDP and TCP protocols. explain
the usage of these headers in transport layer services.[16]
6. How ATM reference model differs from conventional reference
models of ISO/OSI[16]
and TCP/IP. explain how various services are given by
ATM networks.
7. (a) discuss in detail how DNS operates.
Set No.2
(b) What is the architecture of email? elaborate the services given by email?[8+8]
8. Write short notes on any 3 of the following:
(a) Stop and wait protocol is a very noisy channel.
(b) Link state algorithm
(c) TCP transition state diagram]
(d) Architecture of WWW.
[4+4+4+4]

Attachment: jawaharlal-nehru-technological-university-hyderabad-2005-b-e-computer-science-43422-1.bmp

Earning:   Approval pending.