Tuesday, January 25, 2022

Dr.A.P.J.Abdul Kalam University BE VII SEM ALL BRANCH Wireless & Mobile Computing [IT-702] Dec - 2020 Question Paper

Dr.A.P.J.Abdul Kalam University

Bachelor of Engineering

Seventh Semester Main Examination, Dec-2020

Wireless & Mobile Computing [IT-702]

Branch: IT

Time: 3:00 Hrs Max Marks 70

Note : 1. Attempt any five questions out of eight.

2. All question carry equal marks.

Q.1 (a) What is Antenna? Draw and explain any four types ofAntenna.

(b) Why are need Multiple Access Technique? Differentiate

TDMA, FDMA and CDMA techniques.

Q.2 (a) Draw and explain the architecture of cellular system. Whatis Hand off?

(b) What type of services are provided by GSM system? Explain its architecture.

Q.3 (a) Name two types of GSM logical channels and explain them in detail.

(b) Discuss DECT system with its features and characteristics.

Q.4 (a) Describe the physical layer architecture of 802.1 standard.

(b) What is HIPERLAN-2? Draw and explain HIPERLAN-2protocol stack.

Q.5 (a) Define the need of Adhoc networks. Write special features and challenges of Adhoc networks.

(b) What are the functions of Routing protocols in Adhoc network? Give a classification of

Adhoc routing protocols.

Q.6 (a) Describe Indirect TCP and Snooping TCP protocols used in Adhoc networks.

(b) Write a short note on WAP.

Q.7 (a) What is Firewall? Explain the design principle of Firewall.

(b) Differentiate Viruses, Worms and Trojan horse.

Q.8 Write short notes on any two of the followings.

(a) Password management (b) Intruders

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