Jawaharlal Nehru Technological University Hyderabad 2005-2nd Sem B.E Computer Science COMPUTER NETWORKS III B.Techester Regular s, il/ set 4 - Question Paper

Code No: RR320503 Set No.4
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. Compare and contrast Go back to N and selective repeat protocols with the help of
figures. What additional functionality is needed compared to 1bit
sliding window
protocol?[16]
2. (a) What is the Ethernet? elaborate the most commonly used Ethernet cabling
types? provide 1 example in Ethernet lan to avoid collisions.
(b) What is a bridge? How does it function? discuss the usage of spanning tree
bridges.[8+8]
3. (a) Compare virtual circuit and datagram subnets.
(b) What is hierarchical routing? When is it used? State merits and demerits of
hierarchical routing.[8+8]

4. (a) Enumerate transport service primitives. discuss with the help of a state
diagram connection establishment and release using these primitives.
(b) Illustrate various protocol scenarios for establishing a connection using three
way handshake.[8+8]

5. What is TCP service model? discuss in detail usage of TCP segment header in
providing these services[16]
.
6. (a) provide the ATM reference model. explain how this model differs from ISO/OSI
(b) elaborate the currently specified AAL types? How cell header is used to
achieve the service needed at every sublayer.[8+8]

7. (a) Differentiate ranging from static and dynamic content in WWW. How are they
provided?
(b) What is SNMP? discuss its functioning.[8+8]

8. Write short notes on any 3 of the following:
(a) Architecture of email
(b) Pure ALOHA and slotted ALOHA
(c) Link state algorithm
(d) ISO/OSI and TCP/IP models.
[4+4+4+4]

Earning:   Approval pending.