Mobile ad hoc network (MANET) is an infrastructure less dynamic network which is created on demand. MANET is an assembly of mobile nodes which is a temporary network. Mobile nodes frequently come and go out of the network. Because of self-motivated or mobility in nature, nodes are very important factor for the security perspective. In this paper, a review on a various type of network attacks, such as black hole attack, gray hole attack, worm hole attack an many other attacks, which are most dangerous threats for MANET. In this paper, we have presented a review on eliminating and defensive techniques for such kind of attacks in the MANET. Keywords: Mobile ad hoc network (MANET), gray hole attack , black hole attack, AODV (ad hoc on demand distance vector) routing protocolCite this Article Ashish Jain, Shashank Gahoi. Mobile Ad Hoc Network Gray Hole and Black Hole Attack Detection and Defences: A Review. Journal of Network Security. 2016; 4(3): 1–6p.
