CSIT 4th Semester
Computer Networks Board Question Paper 2081

CSC 263-2081 ✡
Tribhuvan University
Institute of Science and Technology
2081
✡
Bachelor Level/Second Year/Fourth Semester/Science
Computer Science Information Technology (CSC 263)
(Computer Networks)
(New Course)
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 Answer Questions
Attempt any Two question.
[2x10=20]
1.

A bit stream 1101011011 is transmitted using the standard CRC method. The generator polynomial is 10011, what is the actual bit transmitted.

2.

What are the features of application layer? Why DNS is required? Explain about recursive, non-recursive and iterative DNS queries.

3.

Provide reasons for transitions from IPv4 to IPv6. Describe IPv6 datagram format.

Section B

Attempt any Eight questions

[8x5=40]
4.

Explain about connection oriented network services.

5.

Illustrate the functionality of Media Access Control.

6.

Why do you think Network Functions Virtualization architecture is required? Explain.

7.

Assume a class C network and divide it into three subnets. What is the value of the new subnet?

8.

Differentiate between web server and proxy server.

9.

Explain the working mechanism of token bucket.

10.

What do you understand by PPP protocol? Explain its link setup process.

11.

Explain any two wireless transmission medias.

12.

Write short notes on:
a. IMAP
b. ICMP