Tribhuvan University
Bachelor of Science in Computer Science and Information Technology
Semester 4 · TU Board 2081
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
(2 × 10 = 20)
- 1.10
A bit stream 1101011011 is transmitted using the standard CRC method. The generator polynomial is 10011. What is the actual bit transmitted?
- 2.10
What are the features of the application layer? Why is DNS required? Explain about recursive, non-recursive, and iterative DNS queries.
- 3.10
Provide reasons for transitions from IPv4 to IPv6. Describe the IPv6 datagram format.
Group B
(8 × 5 = 40)
- 4.5
Explain about connection-oriented network services.
- 5.5
Illustrate the functionality of Media Access Control.
- 6.5
Why do you think Network Functions Virtualization architecture is required? Explain.
- 7.5
Assume a class C network and divide it into three subnets. What is the value of the new subnet?
- 8.5
Difference between web serverand proxy server.
- 9.5
Explain the working mechanism of token bucket.
- 10.5
What do you understand by PPP protocol? Explain its link setup process.
- 11.5
Explain any two wireless transmission media.
- 12.5
Write short notes on:
- ICMP
- IGMP
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