CUSAT Computer Networks Question Paper March 2003
BTS VII (S) -03’ 252 (D)
B.Tech Semester (Supplementary) Examination in Electronics and Communication Engineering March 2003
EC 702 COMPUTER NETWORKS
Maximum Marks: 100
|I.||(a)||Compute the fourier coefficient for the function .||(10)|
|(b)||Explain the different topologies used in computer networks.
|n.||(a)||With a neat diagram, explain the operation of a modem.||(10)|
|(b)||What do you mean” by a LAN ? Illustrate with help of a diagram.||(10)|
|With a neat sketch, illustrate the seven layer architecture of a computer network.
A channel has a bit rate of 4 kbps and a propagation delay of 20 ms. For what range of frame sizes does stop-and-wait gives an efficiency of at least 50 %.
|Explain in detail about the HDLC protocol.
Illustrate the concept of synchronous and asynchronous data transmission schemes, and compare their performance.
- (a) What are the common transmission media used for carrier sense network ?
Illustrate with examples. (10)
(b) Discuss the persistent and nonpersistent CSMA protocol in detail. (10)
- (a) What do you mean – by ISDN ? Discuss its importance in detail. (10) (b) What are collision-free protocols ? Illustrate with examples. (10)
- (a) Explain the various steps involved in the design of a LAN system for office use. (10)
(b) Explain the use of switched multiplexer in a network. (10)
VIII. (a) What is the use of a serial data analyzer ? Explain. (10)
(b) Explain the process of loop back testing. (10)
- (a) Explain the terms:
(i) Queuing time
(ii) Waiting time
(iii) Poissons law
(iv) Probability density function. (4×3=12)
(b) Discuss the performance of a multiserver system with a number of servers in parallel. (8)
- Write short notes on :
(i) Perturbation heuristics. (8)
(ii) FTP (6)
(iii) Virtual terminal. (6)