THEORY EXAMINATION (SEM–VIII) 2016-17 MOBILE COMPUTING

Section A – Basic Concept Questions (Description)

Section A consists of short conceptual questions that test the basic understanding of mobile computing technologies and wireless communication systems. Students are expected to provide short explanations or definitions of important concepts related to mobile networks and communication protocols.

The topics covered in this section include Mobile Computing, Mobile IP, wireless WAN and wireless LAN differences, routing algorithms, and cellular network issues. Students must also understand GSM architecture components such as HLR (Home Location Register) and VLR (Visitor Location Register).

Other important concepts included in this section are handover mechanisms in cellular networks, adaptive clustering techniques in wireless networks, and data broadcasting methods used in mobile communication systems.

The purpose of this section is to evaluate the student’s knowledge of basic terminology and fundamental concepts used in mobile computing and wireless networking.

Questions for Section A

What do you understand by Mobile Computing?

What is Mobile IP?

What are the differences between wireless WAN and wireless LAN?

What is the Temporary Ordered Routing Algorithm (TORA)?

Explain the Near–Far problem in cellular networks.

Explain HLR and VLR in GSM architecture.

What is handover in mobile communication?

Define adaptive clustering.

What is data broadcasting in mobile computing?

What are the different GSM services?

Section B – Descriptive Questions (Description)

Section B contains descriptive and analytical questions that require detailed explanations of mobile network architectures, wireless communication protocols, and mobile computing technologies.

One important topic in this section is General Packet Radio Service (GPRS), which provides packet-switched data services in GSM networks. Students must explain its architecture and working principles.

Another important topic is the IEEE 802.11 wireless LAN architecture, including its MAC (Medium Access Control) layer logic, which controls data transmission in wireless networks.

Students must also understand Mobile IP architecture, including the entities involved and how data is transferred between mobile nodes and fixed nodes.

This section also includes discussions about multiplexing techniques, TCP performance issues in wireless networks, fault tolerance mechanisms, and GSM network architecture with security considerations.

Questions for Section B

What is General Packet Radio Service (GPRS)? Explain its architecture.

Explain the architecture of IEEE 802.11 LAN and its MAC logic.

Describe the entities involved in Mobile IP and explain the data transfer process.

Why is CSMA/CD not suitable for wireless LAN? Explain.

Describe different multiplexing techniques used in communication systems.

Why does traditional TCP not perform well in wireless networks? Explain improvements in TCP.

Explain the fault tolerance issues in mobile computing and monitoring processes.

Discuss the architecture of GSM and the security issues involved.

Section C – Long Analytical Questions (Description)

Section C includes long analytical questions that require deeper understanding of mobile ad-hoc networks (MANET), routing protocols, and distributed mobile file systems.

One of the important topics in this section is routing protocols used in mobile ad-hoc networks, including Global State Routing (GSR), Dynamic Source Routing (DSR), and Destination Sequenced Distance Vector (DSDV). Students must explain their working principles and differences.

Another important topic is the characteristics of Mobile Ad-hoc Networks (MANET) and the routing processes used in these networks. Students must explain how path discovery and path maintenance are performed in the DSR routing protocol.

The section also includes questions about the CODA file system, which is a distributed file system designed for mobile environments. Students must explain its architecture, client operation, and how disconnected operations are handled when a network connection is unavailable.

Questions for Section C

Write short notes on:

Global State Routing (GSR)

Dynamic Source Routing (DSR)

Destination Sequenced Distance Vector (DSDV)

Explain the characteristics of Mobile Ad-hoc Networks (MANET). Describe path discovery and path maintenance in DSR routing protocols.

What is the CODA file system? Explain its clients and how disconnected operations are performed in CODA.