Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2081

Bachelor Level / Second Year / Fourth Semester / Science

B.Sc in Computer Science and Information Technology (CSC263)

(Computer Networks)

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.
A bit stream 1101011011 is transmitted using the standard CRC method. The generator polynomial is 10011. What is the actual bit transmitted?[10]
2.
What are the features of the application layer? Why is DNS required? Explain about recursive, non-recursive, and iterative DNS queries.[10]
3.
Provide reasons for transitions from IPv4 to IPv6. Describe the IPv6 datagram format.[10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Explain about connection-oriented network services. [5]
5.
Illustrate the functionality of Media Access Control. [5]
6.
Why do you think Network Functions Virtualization architecture is required? Explain. [5]
7.
Difference between web server and proxy server. [5]
8.
Explain the working mechanism of token bucket. [5]
9.
What do you understand by PPP protocol? Explain its link setup process. [5]
10.
Explain any two wireless transmission media. [5]
11.
Write short notes on: a. ICMP b. IGMP [5]
12.
Assume a class C network and divide it into three subnets. What is the value of the new subnet? [5]