MC March 2010 Set2

IV B.Tech. I Semester Supplementary Examinations, March 2010
MOBILE COMPUTING
(Common to Computer science &Engineering, Information Technology,
Electronics & Computer Engineering)
Time: 3 Hours Max Marks: 80
Answer any Five Questions
All Questions carry equal marks
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1. a) Discuss in detail about GSM and its services.
b) Write the applications and limitations of wireless networks and
mobile communications.
2. a) What is Spread aloha multiple access (SAMA)? Explain briefly
working of SAMA.
b) Write short notes on classical aloha and slotted aloha.
3. a) Discuss about agent advertisement and delivery.
b) What is the purpose of DHCP? Explain client initialization via DHCP.
4. a) Explain Snooping TCP. What are its advantages and disadvantages.
b) Write brief notes on Fast retransmit / Fast recovery of mobile transport
layer.
5. a) Write in detail about cache invalidation mechanisms.
b) Explain the issues relating to quality of service in mobile networks.
6. a) Explain Pull based data delivery mechanisms in detail.
b) Explain index and distributed index based selective tuning techniques.
7. a) Explain routing complications in Mobile Ad-Hoc networks.
b) Describe security problems in MANETs.
8. a) Explain in detail about Wireless transport layer security.
b) Explain in detail about wireless application environment (WAE)
logical model.