MANET (Mobile Ad hoc NETwork) is evolved through various characteristics such as shared media, this property make routing protocols vulnerable. AODV (Ad hoc On-demand Distance Vector) is a reactive routing where each intermediate node cooperates in the process of route discovery. In this case, the node that behaves as malicious exploit the malfunction of specified service. The black hole attack uses the sequence number that is used to select the freshest route and attract all exchanged data packets to destroy them. Many researchers have dealt with this attack and many solutions have been proposed. These solutions target the network layer only. In this paper, they present their approach to counter black hole attack.