Punjab Technical University 2006-5th Sem B.Sc Information Technology -.-(IT) (O) Computer Networks - Question Paper

Computer Networks
B.Sc.(IT), BSI-503, fifth Semester (2096)
Time: 3Hours max Marks:75
Note: The ques. paper consists of 2 parts. part A is compulsory. Attempt any 9 ques. from part B.

part A

1.

i. What is the principal difference ranging from connectionless communication and connection oriented communication.
ii. List any 2 advantages of having international.
iii. Why does ATM use small, fixed length cells?
iv. What is the difference ranging from a passive star and an active repeater in a fibre optic network?
v. What is the concept of 1 bit sliding window protocol.
vi. Explain the concept of error-correcting codes.
vii. What are the 2 kinds of switches used in circuit switching?
viii. What are 2 popular approaches to packet switching?
ix. What is the need of subnetting?
x. Define the terms Asynchronous Transfer Mode.
xi. What kind of transmission media are used in LANs?
xii. How does a token Ring LAN operate?
xiii. What is CDMA?
xiv. What is the significance of slotted ALOHA?
xv. What do you understand by Busy Tone Multiple Access?
(15x2=30)

Section B

2. In asynchronous TDM, how is number of slots per frame derived?
3. provided a 10-bit sequence 1010011110 and a divisor of 1011, obtain the CRC & check your ans.
4. define the format of an ATM cell. How are ATM cells multiplexed?
5.Give an advantage for every kind of network topology.
6. What is the diffrerence ranging from a central and a secondary hub? Also categorically interrelate the difference ranging from a passive and an active hub.
7. How does TDM combine multiple signals into one?
8. explain the SONET configuration as a physical carrier for ATM.
9. discuss CSMA/CD and its use. What part of 8O2 project uses CSMA/CD ?
10. Which is more efficient, circuit switching & why?
11. define the popular approaches to packet switching.
12. Why is padding necessary for ATM cells? discuss.
13. Differentiate ranging from Address Resolution protocol and Reverse Address Resolution protocol.

Earning:   Approval pending.