SPPU Computer Engineering (Semester 6)
Computer Networks
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Solve any one question from Q1 and Q2
1 (a) What is DNS? Explain in brief hierarchical structure of DNS.
6 M
1 (b) Compare link state routing and distance vector routing.
6 M
1 (c) Explain token bucket and leaky bucket algorithm with diagram.
8 M

2 (a) Explain POP3 and IMAP4.
6 M
2 (b) Explain socket programming with its primitives.
6 M
2 (c) Draw the packet header format of OSPF and explain in detail.
8 M

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 M
3 (b) Draw and explain WAP architecture.
8 M

4 (a) What is WAE (Wireless Application Environment)? Explain in details.
8 M
Write a note on:
4 (b) (i) Wireless LAN.
4 M
4 (b) (ii) WML Script.
4 M

Solve any one question from Q5 and Q6
5 (a) Explain the advantage of DTN over IP network with example.
8 M
5 (b) Draw and explain V1OIP network architecture.
8 M

6 (a) What is Vehicular network? What are the challenges and applications of vehicular network?
8 M
6 (b) What is DTN? Explain different layers of DTN.
8 M

Write a note on: (any 3):
7 (a) Components of optical network.
6 M
7 (b) ATM cell format.
6 M
7 (c) GMPLS.
6 M
7 (d) SDN.
6 M

8 (a) What is Virtualization? List advantages and disadvantages of Virtualization.
6 M
8 (b) Explain how packet switching is different in optical network than Ethernet.
6 M
8 (c) Explain SONET/SDH.
6 M



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