Wireless and Mobile Computing (IT-602) - Important Questions

With the help of suitable diagrams explain Ground wave, sky wave and LOS propagation models of wave propagation.

Define the terms handoff, sectorization, and power control.

Explain the architecture and working of a cellular communication system with a suitable diagram, including why it is called cellular and the concept of handoff.

Explain the architecture of GPRS in detail.

Explain the wireless network protocols DECT, TETRA and UMTS.

Why do we need wireless LAN? Explain architecture of 802.11 LAN.

Explain Bluetooth network with notes on its physical and MAC layers.

Explain HIPERLAN protocol and its four versions/types with neat sketches.

Compare the classical approaches for mobile TCP (Indirect TCP, Snooping TCP and Mobile TCP) with their relative advantages and disadvantages.

What is an Ad Hoc network? Write characteristics, performance issues and applications of Ad hoc networks.

Explain the architecture of wireless sensor networks and discuss their applications.

Explain what a firewall is and discuss firewall design principles and design issues.

Write short notes on any two of the following: (i) Password management (ii) DHCP (iii) Mobile IP