Mobile adhoc networks (MANETs) have received significant attention in the recent past owing to the proliferation in the numbers of tether less portable devices, and rapid growth in popularity of wireless networking. There is a growing interest in the research and development of mobile ad hoc networks (MANETs) in industry and academia. These networks represent complex distributed systems that comprise wireless mobile nodes that can freely and dynamically self-organize into arbitrary and temporary network topologies, allowing people and devices to seamlessly internet work in areas without any pre-existing communication infrastructure (e.g. disaster recovery environments) (Campbell et al., 2001) MANETs present a number of significant technical challenges to the research community before they can be widely adopted or deployed in the communications mainstream, or for that matter, promoted as a commercially viable alternative to entrenched mobile technologies. These networks are energy and bandwidth constrained, fully-distributed, and need to be designed to operate in a wide variety of environments, from military networks with hundreds of nodes, to low-power sensor networks with potentially hundreds of thousands of sensors (Kunz and Cheng, 2002). There is a clear sense in the mobile networking community that wireless networks build on efficient distributed, local acting, self-organizing algorithms will play a central role in the future development of the next generation of wireless networks. Many challenges remain to be resolved, however, including the development of energy-efficient wireless technologies, location and configuration management, addressing and routing, security and Quality of Service (QoS) (Perkins et al., 2002). This paper first describes the general characteristics of mobile Ad hoc Networks. (MANETs), their idiosyncrasies with respect to traditional, hardwired packet networks. It then discusses the issue of Multicasting with respect to MANETs. It emphasizes the need for new MANET-specific multicast Routing Protocols due to its inherent Broadcast capability. It is believed that it is more effective to treat Multicast as a separate problem in MANETs, unlike the evolution of routing in wired networks; where Multicast Routing Protocols (MRP) were developed over the structure of the Unicast Routing Protocols (URP). A major challenge lies in adapting Multicast communication to environments where mobility is unlimited and outages/failures are very frequent.