A Mobile Ad hoc NETwork (MANET) is an autonomous, self-configuring network of mobile nodes that can be formed without the need of any pre-established infrastructure or centralized administration. MANETs are extremely flexible and each node is free to move independently, in any random direction. Each node in the MANET maintains continuously the information required to properly route traffic. This paper presents a simulation study to analyze and evaluate the behavior of the MANET with AODV routing protocol by testing four mobility models (i.e. Random WayPoint (RWP), Reference Point Group Model (RPGM), Gauss Markov Model (GMM) and Manhattan Grid Model (MGM)).