How different types of mobile devices can make up MANET. Also, how MANET can be generated by the movement of these mobile devices and some challenges that are confronted in MANET are analyzed. Mobile Ad hoc NETworks (MANETs) have become of increasing interest in view of their promise to extend connectivity beyond traditional fixed infrastructure networks. In MANETs, the task of routing is distributed among network nodes which act as both end points and routers in a wireless multi-hop network environment. MANET routing protocols are of many type some of them are proactive, reactive and also hybrid.