What are the modifications required in the TCP receiver to implement selective retransmission protocol. [8] b) Explain snooping TCP. What are its advantages and disadvantages? [7]

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IV B.Tech I Semester Supplementary Examinations, Feb/Mar - 2015

MOBILE COMPUTING

(Common to Computer Science & Engineering and Information Technology)

Time: 3 hours Max. Marks: 75

Answer any FIVE Questions

All Questions carry equal marks

*****

1 a) Explain functional architecture of GSM. [8]

b) Write and explain novel applications of Mobile Computing. [7]

2 a) Explain in detail about IEEE 802.11 MAC Data frames. [8]

b) Discuss briefly about CDMA. [7]

3 a) What is basic purpose of DHCP? Name the entities of DHCP. [8]

b) How can DHCP be used for mobility and support of mobile IP? [7]

4 Write about

a) Snooping TCP.

b) Mobile TCP.

c) Transaction oriented TCP. [15]

5 a) Explain in detail about the client/server computing with adaptation. [8]

b) Describe the protocol stack of Bluetooth. [7]

6 Explain in detail the mobile agent architecture with appropriate diagram. [15]

7 What are the various types of routing algorithms in MANETs? Explain each

of them in detail. [15]

8 a) Discuss briefly the user scenario of Bluetooth. [8]

b) Explain about wireless Application protocol. [7]

Code No: R41054 Set No. 1 R10

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MOBILE COMPUTING





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1 a) Explain GPRS architecture reference model. [8]

b) Explain security services in GSM.

[7]

2 a) What are the disadvantages of reservation scheme. [6]

b) Explain polling and inhibit sense multiple access.

[9]

3 a) What is basic purpose of DHCP? Name the entities of DHCP. [6]

b) Explain about agent advertisement and delivery.

[9]

4 a) How does the selective transmission improve the transmission efficiency?

What are the modifications required in the TCP receiver to implement selective

retransmission protocol.

[8]

b) Explain snooping TCP. What are its advantages and disadvantages?

[7]

5 a) What is Mobile IP? Explain tunneling in the context of Mobile IP. [8]

b) Explain three- tier client-server architecture.

[7]

6 Explain in detail about IEEE 802.11 and its architecture..

[15]

7 a) Describe the properties of MANETs. [6]

b) Explain destination sequence distance vector routing algorithm in MANETs.

[9]

8 a) Explain networking, security and link management in Bluetooth. [8]

b) Write about J2ME in briefly. [7]


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MOBILE COMPUTING





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1 Briefly describe the following networks with example and applications:

a) Wired networks. b) Wireless networks. c) Ad hoc networks.

[15]

2 a) What is middleware? Describe its significance in handling the context of any

application.

[8]

b) Write brief notes on:

i) GPS. ii) Mobile Computing through Internet.

[7]

3 a) Describe the GSM architecture with its constituent elements. [8]

b) Explain the features of tunneling and encapsulation.

[7]

4 a) Describe CDMA data protocol stack. [8]

b) Give six functional differences between CDMA and GSM.

[7]

5 a) What is Mobile IP? Explain tunneling in the context of mobile IP. [8]

b) How does mobile IP work? What are the challenges with mobile IP with

respect to high speed mobility? How does cellular IP solve some of these

challenges?

[7]

6 a) What is HiperLAN ? Explain its stack relationship with OSI protocol stack. [8]

b) What is wireless sensor network? Describe various applications of wireless

sensor networks.

[7]

7 a) Explain wireless LAN architecture with schematic block diagram. [8]

b) Describe the WAP application environment.

[7]

8 Write short notes on:

a) SSL and its applications. b) TLS. c) WTLS.

[15]


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1 a) What are the differences between middleware and gateways? Enunciate with

example in the context of mobile computing.

[8]

b) What are the characteristics of mobile computing environment? Describe

variants of mobile computing.

[7]

2 a) What are the important differences between a desktop computer and a portable

computer like PDA?

[8]

b) What are the design constraints for applications targeted for handheld devices? [7]

3 Explain the following in brief in the context of GSM networks:

a) Mobile station b) BSS

c) NSS d) OSS e) IMSI

[15]

4 a) What is Direct Sequence Spread Spectrum Technology? How does it works in

CDMA technology?

[8]

b) Describe different types of handoffs. What are the differences between Hard

handoff, Soft handoff and softer handoff?

[7]

5 a) What is basic purpose of DHCP? Name the entities of DHCP [8]

b) How can DHCP be used for mobility and support of mobile IP?

[7]

6 a) What are the advantages and disadvantages of wireless LAN? Under what

situation is a WLAN desirable over LAN?

[8]

b) Describe IEEE 802.11 family of standards.

[7]

7 What is Mobile Ad hoc Network (MANET)? What are the various types of

routing algorithms in MANETs? Explain each of them in detail.

[15]

8 Explain in detail about IEEE 802.11 and its architecture. [15]


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What are the modifications required in the TCP receiver to implement selective retransmission protocol. [8] b) Explain snooping TCP. What are its advantages and disadvantages? [7]