A network is any collection of things linked together by connections of some sort. The Internet is
 a collection of computers linked by communication lines, while an ecosystem consists of species
 linked by relationships of predator and prey.In recent years
study of networks has been playing a major role in social and biological sciences.
I would like you to present a  small review of the subject.
Particularly address the following points :
(i) What are networks ?
(ii) Different Kind of networks and their xamples
(iii) Why growing networks are scale-free ?
(iv) How to generate SF networks ?


Review Articles by A.-L. Barabási
1. The physics of the Web,Physics World 14, 33-38 (2001).
2.  Scale-free networks,Scientific American 288, 60-69 (2003).
3.  Taming complexity,Nature Physics 1, 68-70 (2005).
4.  Solution of  BA-model :  by S. Jalan and PK