Abstract: Mobile Ad-hoc Network(MANET) is the infrastructure less and the central object less network in which the mobile nodes can be communicate with the wireless connections. Any node can join and leave the network anytime nodes may change its place and move one place to another place anytime in network. Due to this characteristics of MANET itís a more vulnerable to network attacks such as black hole, gray hole, sink hole and selfish attacks. The aim of the selfish attack is to preserve the own resources such as battery power, bandwidth etc. This paper surveys the effect of selfish attack on the network performance matrices.

Keywords: Network Security, MANET, Selfish attack, countermeasures, wireless security, Types of selfish attack;