Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2080.2

Bachelor Level / Second Year / Fourth Semester / Science

Bachelors in Information Technology (BIT254)

(Network and Data Communications)

Full Marks: 60

Pass Marks: 24

Time: 3 Hours

Candidates are required to give their answers in their own words as for as practicable.

The figures in the margin indicate full marks.

Section A

Long Answers Questions

Attempt any TWO questions.
[2*10=20]
1.
What are the features of Distance Vector Routing protocol? Explain Distance Vector Routing protocol with relevant example. What are its disadvantages?[10]
2.
Explain the concept of Binary Phase Shift Keying. Represent bit sequence 111000110 by the following waveform a.) NRZ-I, b) Differential Manchester[10]
3.
Explain the design of Selective Repeat ARQ. Illustrate with suitable flow diagram example[10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
List different categories of networks and explain [5]
5.
What is SNMP and how does it work? [5]
6.
What is MAC-address? The message sequence is 1011011 and generator polynomial G(X) = $x^3 + x^2 + 1$. Calculate the transmitted encoded frame [5]
7.
How IGMP allows devices to join a multicast group? Explain [5]
8.
Differentiate between reliable and unreliable protocol. Provide example of each. How does protocol check for errors? [5]
9.
Explain different phases of packet switching. How packet switching works? [5]
10.
Explain Frequency Division Multiplexing with required figure [5]
11.
A pure ALOHA network transmits 200-bit frames using a shared channel of bandwidth. Find throughput if system produces frames per second. Vulnerable time of pure ALOHA? [5]
12.
Write short notes on a.) Shannon Capacity Write short notes on b.) Connectionless service [2.5+2.5]