Pokhara University
Bachelor of Engineering in Computer Engineering
Semester 6 · PU Spring 2023
Course Title: Computer Networks
Full Marks: 100Pass Marks: 45Time: 3hrs.
Candidates are required to give their answers in their own words as far as practicable.
- 1.
- a) Discuss the merits and demerits of computer network. Compare star, 4+3 bus, ring and mesh topology.
- b) Explain the working principle of different types of network devices: g hub, switch, bridge, and router.
- 2.
- a) Explain circuit switching mechanism. Explain the terms throughput, 3+4 latency, bandwidth and jitter.
- b) What is error control. Explain CRC method of error detection witha 246 suitable example.
- 3.7
- a) Explain Gigabit Ethernet with help of below parameters: Mac-sub layer, full duplex mode, half duplex mode, topology, implementation and encoding.
- b) What are the draw backs in IPV4? Which of the draw backs do IPV6 44.4 solve? Explain.
- 4.7
- a) Perform the sub netting of 192.168.0.0 using CIDR value 26. What is 5+3 VLSM and why do we use it?
- b) Discuss about Interior and Exterior Routing protocols. What is count to infinity problem in distance vector.
- 5.8
- a) What is congestion in a network. Explain about congestion control mechanism.
- b) List out and explain TCP client/server socket flow with suitable 7, diagram.
- 6.15
- a) Explain the roles of proxy server. Compare HTTP with HTTPS.
- b) What do you mean by network security? Explain RSA algorithm.
- 7.
Write short notes on: (Any two) _ 2x5
- b) Optical fiber ne
- c) CSMA/CD 1
— The End —