Questions
Syllabus
Qns. By Syllabus

Semester

Subject

Year

Tribhuwan University

Institute of Science and Technology

2076

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.
Explain each layer of TCP/IP model in detail. Compare it with OSI model. [10]
2.
Define transmission media. What are different types of transmission media. Explain different types of unguided media in detail. [10]
3.
Define flow control. Explain Go-Back-N ARQ with suitable example. How is it different from Stop-and-Wait ARQ? [10]
Section B

Short Answers Questions

Attempt any Eight questions.
[8*5=40]
4.
Define network topology. Explain ring topology along with its merits and demerits. [5]
5.
Explain LAN with example. How is it different from PAN? [5]
6.
Define routing table. Differentiate static routing table with dynamic routing table. [5]
7.
What is switching? Compare and contrast a circuit-switched network and packet-switched network. [5]
8.
Why do we need wireless LAN? Explain the architecture of IEEE 802.11 in detail. [5]
9.
What is NAT? How does it work? What are its benefits? [5]
10.
Why do we need a DNS system when we can directly use an IP address? what is domain name space? [5]
11.
Write short notes on (any two): a. Connection-oriented service b. Bridge c. Hamming distance [5]
12.
In a block of address, we know the IP Address of one host is 192.34.12.56/28. What are the first address(network address) and the last address (limited broadcast address) in this block? [5]