Computer Networks, 2067 Ashadh - Old questions

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

Computer Networks, 2067 Ashadh

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+5]
  • 1. Why network software should be in hierarchical form? Explain in detail about OSI layer.
  • [6+2]
  • 2. If you are assigned to design a LAN for Pulchowk Campus having 5 departments. Each department will have 100 computers locating in 5 rooms each equipped with 20 computers. Make your own justification while selecting connecting devices and accessories.
  • [3+5]
  • 3. What do you mean by ISDN and what is it contribution in the field of data communication? Explain various types of multiplexing mechanisms used in communication.
  • [4+4]
  • 4. Describe what do you understand by switching along with various types of switching mechanism. Explain the fault tolerance mechanism of FDDI.
  • [2+6]
  • 5. Why access control of channel is essential? Compare operating details of IEEE 802.4 and IEEE 802.5.
  • [4+4]
  • 6. Explain along with the packet format about the virtual circuit connection of X.25.
  • [2+6]
  • 7. Why routing is essential in computer networking? Compare working of distant vector routing algorithm with link state routing algorithm.
  • [8]
  • 8. Explain in detail about IP frame format.
  • [8]
  • 9. If you need to assign IP addresses to all computers of question no 2 making each department as a network. What will be your approach? Explain with IP address ranges you are suggesting.
  • [3+5]
  • 10. How the protocol SMTP operate? Explain the procedures to make your network secured.