Ad hoc nature of Mobile Ad hoc NETwork makes MANET most promising communication model in rescue and military areas. Its dynamicity property and infrastructure less deployment invites attacker (insider or outsider) to disrupt the MANET. Hosts itself as a router makes cooperation better but finding the route has inherent weakness which is beneficial for intruders to declare authenticate itself in MANET. On demand routing protocols such as AODV works well in context MANET consequently targeted for attack for the intruders. Various mechanisms has been proposed since the evolution of the MANET having their own pros and cons. Author has depicted the solution for the Black Hole (BH) and gray hole of both type towards source and destination.