International Journal of Computer Applications
In present years, security is important concern in Mobile Ad hoc NETwork (MANET). MANET is self organized network which contains mobile nodes communicate with each other using wireless links. Nodes in the network are free to move in and out of the network. Due to its unique characteristics like dynamic topology, Lack of central management, limited resources and they are vulnerable to various types of attacks. In this paper, the authors will present survey of various attacks like black hole, gray hole and worm hole attack in MANET. They will also discuss various proposed solutions to prevent and elimination of these attacks.