Computer Networks - Dec 2015

Computer Engg (Semester 6)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.

Solve any one question from Q1 and Q2

1 (a) What is DNS? Explain in brief hierarchical structure of DNS.(6 marks) 1 (b) Compare link state routing and distance vector routing.(6 marks) 1 (c) Explain token bucket and leaky bucket algorithm with diagram.(8 marks) 2 (a) Explain POP3 and IMAP4.(6 marks) 2 (b) Explain socket programming with its primitives.(6 marks) 2 (c) Draw the packet header format of OSPF and explain in detail.(8 marks)

Solve any one question from Q3 and Q4

3 (a) Compare and explain 802.11a, 802.11b and 802.11g wireless standards with respect to
i) Bandwidth.
ii) Frequency.
iii) Signal to noise ratio.
iv) Range.(8 marks) 3 (b) Draw and explain WAP architecture.(8 marks) 4 (a) What is WAE (Wireless Application Environment)? Explain in details.(8 marks)

Write a note on:

4 (b) (i) Wireless LAN.(4 marks) 4 (b) (ii) WML Script.(4 marks)

Solve any one question from Q5 and Q6

5 (a) Explain the advantage of DTN over IP network with example.(8 marks) 5 (b) Draw and explain V1OIP network architecture.(8 marks) 6 (a) What is Vehicular network? What are the challenges and applications of vehicular network?(8 marks) 6 (b) What is DTN? Explain different layers of DTN.(8 marks)

Write a note on: (any 3):

7 (a) Components of optical network.(6 marks) 7 (b) ATM cell format.(6 marks) 7 (c) GMPLS.(6 marks) 7 (d) SDN.(6 marks) 8 (a) What is Virtualization? List advantages and disadvantages of Virtualization.(6 marks) 8 (b) Explain how packet switching is different in optical network than Ethernet.(6 marks) 8 (c) Explain SONET/SDH.(6 marks)