Computer Networks, 2063 Ashwin - Old questions

TRIBHUVAN UNIVERSITY
INSTITUTE OF ENGINEERING
Examination Control Division
Full Marks:
80
Pass Marks
30
Time
3 hrs.

Computer Networks, 2063 Ashwin

Candidates are required to give their answers in their own words as far as practicable.
Attempt All questions.
The figures in the margin indicate Full Marks
Assume suitable data if necessary
    [3+4]
  • 1. Why do you need to divide the network function to layers? Give a simple example that illustrates how division of function increases effectiveness.
  • [5+3]
  • 2. What are the main purposes of NIC and Router? Which layer they operate on? Discuss.
  • [7]
  • 3. Explain the guided and unguided transmission media and compare it with example.
  • [4]
  • 4. Differentiate between random and slotted ALOHA.
  • [4+5]
  • 5. Explain channel access method and MAC frame in IEEE 802.4.
  • [6]
  • 6. What are the features of X.25? Discuss briefly.
  • [6+2]
  • 7. Explain class A and class B addresses. What is the purpose of subnetting?
  • [3+4]
  • 8. What is the purpose of ICMP? List down and explain query ICMP messages.
  • [4+4]
  • 9. What is difference between active open and passive open form of connection with TCP ports? Why are sequence number and acknowledgment number needed in TCP connection?
  • [6]
  • 10. What is RIP and how does it work? Discuss.
  • [5+5]
  • 11. Write short notes on :
    a) Wireless Transmission Media
    b) FTAM