APRIL 2021 SUBJECT CODE:PSBEL
Time : Three hours Maximum : 75 marks
PART A — (10 × 1 = 10 marks)
Answer any TEN questions.
1. List the problems in signal propagation.
2. What is the goal of multiplexing scheme?
3. Define MEO.
4. What are the different algorithms used for security in GSM?
5. What are IMT-2000 set of standards?
6. What is HIPERLAN?
7. What is a scatter net?
8. Define agent advertisement.
9. What provides several services for the mobile node located in the home network?
10. Give one difference between destination sequence distance vector and standard distance vector
algorithm.
11. What do you mean by selective retransmission?
12. What is the difference between UDP and TCP?
PART B — (5 × 5 = 25 marks)
Answer any FIVE questions.
13. Discuss the need for Mobile computing.
14. Briefly explain about classical aloha.
15. What are the different types of satellite orbit? Explain.
16. Explain the structure of an IEEE 802.11 MAC data frame.
17. Explain Bluetooth Piconet.
18. Discuss on Tunneling and Reverse Tunneling.
19. Explain the working of Indirect TCP.
PART C — (4 × 10 = 40 marks)
Answer any FOUR questions.
20. Describe the various Multiplexing schemes.
21. Elaborate on the localization and calling functionalities of GSM systems.
22. Describe in detail the basic concepts of the handover scenarios of HIPER LAN2.
23. Describe the various IP encapsulation mechanisms.
24. With a suitable example, compare the behavior of DSDV and DSR algorithms with their routing
table.
25. Explain the mechanism of snooping. What are its advantages and disadvantages?
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