The VANETs (Vehicular Ad-Hoc Networks) widely recognized with Manets (Mobile Ad-Hoc Networks) and turns into the demanding area of research. In VANETs moving vehicles act as the nodes and router to create a mobile network. The information exchanged in vehicles are depend upon the communication mode. The communication takes part in three ways vehicle to vehicle, vehicle to infrastructure and hybrid mode. The major goal of VANETs is to improve the overall safety of transportation infrastructure that includes more comfortable driving, minimize accidents, local danger warnings, up?to-date traffic information and internet access. Due to the mobility of nodes the issues arise related to security and the attacker attacks to reduce the security. In most cases, attacks on the availability that unavailable the resources due to a selective forwarding attack that aims to halt the network. Routing protocols is used to improve security, detect and prevent attacks in VANETs. Hybrid approach implementation for prevention and detection using DSR and BFOA are use to improve the security and throughput performance
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