Anna University Coimbatore 2010 M.E Computer Science Et 9263 adhoc networks - Question Paper

ET 9263 ADHOC NETWORKS

PART A (10 * two = 20 marks)

1.Packet radio was a technology that extended packet switching. Justify.
2.What is the technique behind construction of sensors?
3.Define hidden terminal issue with an example.
4.Differentiate on-demand and table driven approach to routing.
5.What is Indirect TCP and snooping TCP? Compare the identical.
6.Discuss the different kinds of attacks possible over an adhoc network.
7.List kinds of sensors available wit their applications.
8.What is power aware routing?
9.Define beaconing and elaborate the impacts of beacon messages over battery life time.
10.How do you measure throughput over an adhoc network?

PART B (5 * 16 = 20 marks)

11.a) With the architecture of PRNETs list the tech. challenges and components
of a packet radio network. (10)
b) How is a sensor node various from an adhoc node? discuss (6)

(or)

12.a) discuss the evolution and generation of mobile cellular networks. (10)
b) explain in brief WLL and its significance over wireless networks. (6)


13.Explain in detail the MAC protocols and the problems behind supporting channel access for adhoc wireless networks. (16)

(or)

14.a) How is cluster switch gateway routing various from destination sequenced distance vector routing? What is the range of a cluster node and elaborate the entries in a cluster table? (13)
b) explain the route cache mechanism of DSR. (3)


15.a) explain the importance of TCP Reno, TCP Vegas and TCP Tahoe. (6)
b) List the issues and problems faced by mobile adhoc networks using traditional TCP. elaborate the requirements to shift from traditional TCP to versions of TCP?
(10)

(or)

16.a) Write short notes on secure routing. elaborate the security parameters to consider over adhoc channels? (10)
b) Classify the QoS solutions based on MAC layer and the network layer. (6)


17.a) elaborate the parameters to measure the performance of batteries? Smart batteries can support the tracking of power life. Justify. (6)
b) discuss the different techniques and mechanisms for advances in device power management? (10)

(or)

18.Power limitations in mobile devices are a serious factor. Do the algorithms designed to conserve power currently address the data link, network and transport level protocol solutions. explain a few of the research works concerned with the identical. (16)

19.a) Shortest path based routing cannot be appropriately applied to wireless adhoc networks. Why? (6)
b) With an example show how longetivity of routes are maintained in associatively based routing. (10)

(or)

20.Evaluate the performance of ABR routing protocol with respect to one, 2 and multiple hops. Include performance parameters such as control packet overhead, route discovery time, data throughput and end to end delay. (16)

Earning:   Approval pending.