# VTU B.E Computer Networks I Dec 2015 / Jan 2016 Question Paper

VTU Question Papers are updated here. Students who are studying under VTU, can download the question paper asked in previous years. Here, you can download December 2015 / January 2016 exam paper of Computer Networks – I. It is 5th semester VTU question paper. Download Images as well as Text version of this question paper.
VTU Question Paper
USN 10CS55
Fifth Semester B.E. Degree Examination, Dec. 2015/Jan.2016
Computer Networks – I
Time: 3 hrs. Max. Marks: 100
Note: Answer FIVE full questions, selecting at least TWO questions from each part.

PART – A
1 a. Define network. With a neat diagram, explain the four basic topologies. (05 Marks) b. With the help of a diagram, explain the functionalities of each layer of OSI reference model. (10 Marks)
c. List and explain the four levels of addresses used in an internet employing the TCP/IP protocols. (05 Marks)
2 a. Define latency. Briefly explain the components of latency. What are the propagation time and
transmission time for a 5 Mbyte message (image), if the bandwidth of the network is 1 Mbps? Assume that the distance between the sender and receiver is 12000 km and that light travels at
2.4 × 108 m/s. (08 Marks) b. Explain the PCM technique used for analog to digital conversion. (Taking suitable example). (08 Marks)
c. What is line coding? Represent the sequence “01001110” using NRZ-L, NRZ-I and Manchester
schemes. (04 Marks)
3 a. What is TDM? Explain in detail. (07 Marks) b. Explain virtual circuit network with an example, and also briefly discuss the phases. (10 Marks)
c. Five channels, each with a 100 KHz bandwidth are to be multiplexed together. What is the minimum bandwidth of the link is there is a need for a guard band of 10 KHz between the channels to prevent interference? (03 Marks)
4 a. How does datawords and codewords is represented in block coding and also explain how can errors be detected and corrected by using block coding. (10 Marks)
b. Find the code word using CRC given data “1101” and generator “1100”. (10 Marks)
PART-B
5 a. With a neat diagram, explain any two protocols of noisy channel. (12 Marks)
b. Explain the frame format of HDLC protocol. (08 Marks)
6 a. Describe pure ALOHA and slotted ALOHA. (10 Marks)
b. What is channelization? List and explain the channelization protocols. (10 Marks)
7 a. Explain the different types of addressing mechanism in IEEE 802.11. (05 Marks) b. Define Bluetooth and explain the architecture of Bluetooth. (06 Marks)
c. With a neat diagram, explain the categories of connecting devices. (10 Marks)
8 a. Explain classful addressing and classless addressing with respect to IPV4. (08 Marks)
b. Explain in detail IPV6 packet format. (08 Marks)
c. Give a comparison between IPV4 and IPV6. (04 Marks)