MC November 2009 Set2

IV B.Tech I Semester Regular Examinations, November 2009
MOBILE COMPUTING
(Common to Computer Science &Engineering, Information Technology,
Electronics &Computer Engineering)
Time: 3 hours Max Marks: 80
Answers any Five Questions
All Questions carry equal marks
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1. (a) Explain the applications and limitations of mobile computing. [8]
(b) Explain GSM system architecture. [6]
2. Compare the following four medium access systems. [16]
(i) SDMA (ii) TDMA (iii) FDMA (iv) CDMA
3. (a) Explain the entities of mobile IP. [8]
(b) Describe Data transfer from a mobile node to a fixed node and vice versa. [8]
4. (a) Write detailed notes on Fast retransmit/fast recovery of Mobile transport
layer. [8]
(b) Explain Transmission/ Time-out freezing approach. [8]
5. (a) Explain power-aware computing. [8]
(b) Explain the following cache invalidation mechanisms. [8]
(i) State less Asynchronous (ii) Stateful synchronous
6. Explain data delivery methods in detail. [16]
7. (a) Explain in detail, properties of MANET. [8]
(b) Describe security problems in MANETs. [8]
8. (a) Explain the architecture of WAP. [10]
(b) Explain briefly about the wireless Datagram protocol (WDP) of transport layer.
[6]