Andhra University 2005 B.Tech Information Technology - Computer Networks - Question Paper

MODEL PAPER

B. Tech (IT) Degree exam

Third Year - 2nd Semester

COMPUTER NETWORKS

Time: three hrs
Max Marks: 70

First ques. is Compulsory

ans any 4 from the remaining ques.

All ques. carry equal marks

ans all parts of any ques. at 1 place

1.a) Distinguish ranging from backend LANs and backbone LANs
b) elaborate the possible kinds of delay in a packet switched network?
c) What is flooding?
d) List the main requirements of a internetworking facility
e) Write the major difference ranging from IP and UDP
f) What is Switching Hub?
g) Write the important functions of Gateway

2. a) define the services and kinds of operation given by the LLC protocol. Write the basic functions performed by the MAC layer
b) Write in detail the key requirements for a Wireless LAN. Briefly describe IEEE 802.11 services

3. a) Compare and contrast circuit switching and packet switching
b) elaborate the requirements for a routing function for a packet switching network? Develop the static routing table for node A and node D of the subsequent sub-network using 1 of the routing algorithms and draw the routing diagrams for node A & node D.
------DIAGRAM------

4. a) discuss adaptive routing with its merits and demerits
b) define the sequence of events for i) a call from mobile unit to a fixed subscriber ii) a call from fixed subscriber to a mobile unit

5. a) define the operation of a Connectionless Internetworking scheme
b) discuss briefly the meaning of the subsequent IP addresses. State also which of the addresses can be used only as source addresses and which ones only as destination addresses
0.0.0.0, 0.0.0.3, 255.255.255.255, 130.29.255.255, 192.117.25.7, 127.0.0.1

6. a) What is TCP? Spell out the acronym and define TCP briefly. Also tell for what purpose TCP was developed. What pieces of identification info are needed to unambiguously specify a TCP connection? What is the silly window syndrome and how can this issue be solved (at the sending and at the receiving end)
b) define the credit scheme used by TCP for flow control.

7. a) Briefly discuss radix 64 encoding
b) discuss what e-mail systems can do and how they are organized

8. Write short notes on any 2 of the subsequent
a) Token Ring Repeater b) Datagram Operation
c) ICMP d) HTTP

Earning:   Approval pending.