B.E-B.E Information Technology 7th Sem 080250043-MOBILE COMPUTING(Anna University Chennai-2013)
B.E/B.TECH. DEGREE EXAMINATION, MAY/JUNE 2013
Seventh Semester
Information Technology
080250043-MOBILE COMPUTING
(Regulation 2008)
PART A-(10*2=20 marks)
1. Why data dissemination is required for communication?
2. List out the services offered by GSM.
3. What is meant by exposed terminal problem?
4. Differentiate between DSSS and FHAA.
5. What is the need for enhancing IP network capacity?
6. Define mobility binding.
7. "RTT is important in TCP data streams". Why?
8. What is meant by timeout freezing transmission?
9. What are the characteristics of mobile agent?
10. Define UPnP.
PART B-(5*16=80 marks)
11. (a) With a neat diagram explain in detail about the mobile computing architecture for a mobile Device.
Or
(b) Describe in detail about the system architecture of GPRS with a neat diagram.
12. (a) Why do MAC scheme in wired network fails in wireless networks and how does the multiple access with collision avoidance (MACA) scheme work?
Or
(b) Describe the following:
(i) Barker code and make use of it with an example.
(ii) Pseudo-noise codes.
13. (a) Write notes on the following:
(i) Location Management of mobile nodes.
(ii) Registration of mobile nodes with an example.
Or
(b) What do you mean by reverse tunnelling an bi-directional tunnelling? How does the reverse Tunnel help when the time-to-live for the packets at a foreign agent is small?
14. (a) Describe the states of a TCP connection. How does the change of state from LISTEN to CLOSE take place at the transmitter and receiver ends?
Or
(b) Describe the highlights of Mobile OS. Explain architecture of any one open OS from Mobile devices.
15. (a) What are the security threats to a MANET? Explain the similarities in MANET and Wireless sensor networks?
Or
(b) "Service discovery is an adaptable middleware in a device". Justify the statement with an Middleware architecture.
| Earning: ₹ 9.00/- |
