University of Mumbai 2009 M.Sc Information Technology Mobile Comnication & Advanced Computer Network - Question Paper

Tuesday, 16 July 2013 03:55Web

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Kindly obtain the Attachment.

(3 Hours) [Total Marks : 75

N.B (1) Attempt any fivt questions but not more than three questions from any section

(2) Answers to the two sections must be written in separate answer books and should be submitted separately, <

(3) Write answers to same question together,

(4) Each question carries 15 marks

Section I

1. a} Explain what are the problems encountered during propagation of signals in 05 _< a wireless network.

fy Explain how does code division multiplexing help in transmission of 05 information over wireless networks? State its advantages and disadvantages,

Explain the reasons why baseband signal cannot be directly transmitted in 05 wireless systems.

OR

2y a) What is roaming? List and explain the steps for roaming between access 06 ' points.

b) Write a shoet note on: 05

i. Exposed terminals

ii. Tple services in GSM networks.

c) What are foreign and home agents? Explain the registration of a kobile 04 node via the foreign agent with the home agent.

3. a) State the characteristics and system arctitecture of a DECT network. 06

b) What are ad-hoc networks? State their advantages and disadvantages. 04

c) Write short note on mobile terminated calls. 05

OR

Write a short note on MACand Location management. 04

>) What is DHCP? Explain the process of client initialization via DHCP. 06

<?) State advantages and disadvantages of HAWAII. - 05

5. a) What are the ggeneral problems of Mobile IP regarding security and 04

support of quality of service?

b) How does caching improve access time and reduce bandwidth 05 requirements? Explain.

c) Write short note on : 06

i. WAP

ii. Reservation TDMA

OR

6. a How and why does I-TCP isolate problems on the wireless link? What are 06

the main drawbacks of this solution?

b) What problems of HTTP can WSP solve? Why are these solutions 05 especially needed in wireless mobile environments?

c)_y What is broadcasting? Explain inbrief digial audio broadcasting. 04

&	Explain the situations where LAN switch is prefer instead of routers.	8
	List the steps involved in Network Designing, \ ^f c> Jv... OR	7
a	DiscusstheadvantagesanddisadvantagesofSONET. -	8
b	Write note on ESCON (Enterprise System Connection) Architecture.	7
a	Discuss the benefits of Frame Relay over Private Line Networks.	8
b	Compare Open and Closed Loop architectures. 4 OR	7
a	Write note on Link Access Protocol, Balanced (LAPB)	8
b	Explain the various possible causes of delay in the network.	7
a	Write note on Switched MultiMegabit Data Service (SMDS).	8
b	Discuss the technical requirements and strategies that should be consider before designing the network.	7