Semester
Subject
Year
Credit:
Nikesh Dhimal
Nikesh DhimalTribhuwan University
Institute of Science and Technology
2081
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.
Divide the network 192.168.2.0/24 into subnets having 48 hosts each. Find the subnet ID, subnet mask, broadcast address and network ranges. What are the advantages of subnetting? [7+3]
2.
Explain the layers TCP/IP protocol suite in detail. [10]
3.
Differentiate between pure ALOHA and slotted ALOHA. Explain any three network layer protocols. [4+6]
Section B
Short Answers Questions
Attempt any Eight questions.
[8*5=40]
4.
Write down the major difference between TCP and UDP protocol. [5]
5.
Represent bit sequence 1100100111 by the following waveform: (a) NRZ-L (b) NRZ-I (c) Differential Manchester. [5]
6.
Make distinction between link state routing & Distance Vector Routing with example. [5]
7.
What is the major purpose of DNS? Explain how DNS resolve its domain name. [5]
8.
Discuss different guided transmission medium in brief. [5]
9.
A bit stream 1001100 is transmitted using a standard CRC method. The generator polynomial is . Show the actual bit string transmitted. [5]
10.
Differentiate between circuit switching and packet switching. [5]
11.
Explain any one error control technique. [5]
12.
Write short notes on: Token Bucket SNMP [0+2.5+2.5]