Enrollment No: _______________________

Exam Seat No:_______________________

C.U.SHAH UNIVERSITY Winter Examination-2015 Subject Name : Wireless Networks & Security Subject Code : 5CS05WNS1 Semester :5

Date :02/12/2015

Branch :M.C.A. Time :2:30 To 5:30

Marks : 70

Instructions: (1) Use of Programmable calculator and any other electronic instrument is prohibited. (2) Instructions written on main answer book are strictly to be obeyed. (3) Draw neat diagrams and figures (if necessary) at right places. (4) Assume suitable data if needed.

SECTION – I Q-1

Attempt the Following questions a. b. c. d. e.

Q-2

(07)

Define Cryptography Give full form of HSCSD What do you mean by Hash function? What is brute-force attack? What is AMPS?

Attempt all questions a. Explain OSI security architecture. b. Describe future and limitations of 4G in detail.

1 1 1 2 2 (14) 7 7

OR Q-2

Q-3

Q-3

Attempt all questions a. Explain Mobile Adhoc network. b. Explain Bluetooth wireless Personal area network. c. What is ZigBee (802.15.4) ? Explain. Attempt all questions a. Draw and explain the model for network security. b. Describe digital signature concept. c. Differentiate symmetric and asymmetric cryptography. OR a. Explain Wi-Max properties and architecture. b. Explain GPRS network architecture. Page 1 || 2

(14) 4 6 4 (14) 5 5 4

7 7

SECTION – II Q-4 a. b. c. d. Q-5 a. b.

Attempt the Following questions

(07)

Give the full form of UTMS. What is TACS? What do you mean by cryptanalyst? What is meant by IS-95?

1 2 2 2

Attempt all questions What is RC4? Explain its process with example. What is wireless sensor network? How it works? State challenges with WSN. OR Explain different modes of block cipher. What is HMAC? Explain in detail.

Q-5

a. b.

Q-6

Attempt all questions a. Express key distribution concept in public key cryptography. b. State the limitations of 3G. c. Describe QOS security. OR Attempt all Questions a. Give the differences between 2G and 3G. b. What is Wireless LAN? Explain. c. Explain TCP over Wireless network.

Q-6

Page 2 || 2

(14) 7 7 7 7

(14) 4 4 6

5 5 4

Wireless Networks & Security.pdf

What is Wireless LAN? Explain. 5. c. Explain TCP over Wireless network. 4. Page 2 of 2. Main menu. Displaying Wireless Networks & Security.pdf. Page 1 of 2.

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