Detection of Black and Gray Hole Attack in Manet: A Review

摘要

A mobile ad-hoc network (MANET) is a wireless mobile communication. It is a temporary network. It is setup by the group of multi-hop and self-conFig. d mobile nodes. MANET is without any network infrastructure or access points. Mobile unique characteristics such as dynamic topology, infrastructure less, node mobility, self-conFig. d and self-organizing makes it different from other networks but these types of networks are more prone to various types of attacks. In mobile ad-hoc network, any node leaves or joins the network any time. The mobility and dynamic nature of node in the network, the malicious node easily enters in the MANET. The malicious node through various types of attacks easily enter in the network like gray hole attack, black hole attack, routing attack, message altering attack etc. The Black hole and Gray hole packet dropping attack, easily enter in the network through a malicious node. Due to these attacks in the network there is an impact on the different network performance metrics such as throughput, packet delivery ratio and normalized routing load etc. Protecting the network layer from attacks is an important and challenging security issue in mobile ad-hoc networks (MANET) .