Tribhuvan University
Bachelor of Science in Computer Science and Information Technology
Semester 4 · TU Board 2076
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. (2x10=20)(2 × 10 = 20)
- 1.10
Explain each layer of TCP/IP model in detail. Compare it with OSI model.
- 2.10
Define transmission media. What are different types of transmission media. Explain different types of unguided media in detail.
Answer comingAlso asked in 2078
- 3.10
Define flow control. Explain Go-Back-N ARQ with suitable example. How is it different from Stop-and-Wait ARQ?
Answer comingAlso asked in 2078
Group B
Attempt any Eight questions. (8x5=40)(8 × 5 = 40)
- 4.5
Define network topology. Explain ring topology along with its merits and demerits.
Answer comingAlso asked in 2079
- 5.5
Explain LAN with example. How is it different from PAN?
- 6.5
Define routing table. Differentiate static routing table with dynamic routing table.
Answer comingAlso asked in 2078
- 7.5
What is switching? Compare and contrast a circuit-switched network and packet-switched network.
- 8.5
Why do we need wireless LAN? Explain the architecture of IEEE 802.11 in detail.
- 9.5
What is NAT? How does it work? What are its benefits?
- 10.5
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?
- 11.5
Why do we need a DNS system when we can directly use an IP address? what is domain name space?
- 12.5
Write short notes on (any two):
- Connection-oriented service
- Bridge
- Hamming distance
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