Tribhuvan University
Bachelor of Science in Computer Science and Information Technology
Semester 4 · Model question
Course Title: Computer Networks (CSC263)
Full Marks: 60Pass Marks: 24Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.
Group A
Attempt any two questions.(2 × 10 = 20)
- 1.10
Suppose you are assigned to design a LAN for an office having 3 departments. Each department will have 50 computers locating in 10 rooms each equipped with 5 computers. Make your own justification while selecting connecting devices and acccessories.
- 2.10
Highlight on the importance of routing algorithm. Explain Distance Vector Routing algoriithm and compare it with link state routing.
Answer comingAlso asked in 2080, 2079, 2078
- 3.10
Explain various congestion control approaches.
Group B
Attempt any eight questions.(8 × 5 = 40)
- 4.5
Is 192.16.144.64/27 a host, network, or broadcast address? In which layer of OSI model do Hub, Switch and Router operate on?
- 5.5
Describe the working procedure of Token bus and Token ring.
- 6.5
Why do you think network traffic analysis is carried out? How does IPv6 overcome the disadvantages of IPv4?
- 7.5
Find Hamming code for data 01100111.
- 8.5
Differentiate between frame relay and ATM.
- 9.5
What is the function of proxy server? Explain about electronic mail.
- 10.5
Demonstrate the use of socket programming for creating network application using UDP and TCP with necessary diagrams.
- 11.5
Explain DNS with reference to its hierarchy and records.
- 12.5
Write short notes on (any two):
a) Firewall
b) Packet switching
c) NGN
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