Date Added: Jul 2011
To support group oriented service which is said to be the primary application that are addressed by Mobile Ad hoc NETworks (MANETs) in recent years, multicast routing is used. Hence there is a need to design stable and reliable multicast routing protocols for MANETs. In recent years several multicast routing protocols have been designed. Though these protocols are used for the same purpose, each protocol varies according to the design principles, working environment, functionality etc. In this paper, the authors have made a study about some routing protocols and have given a detailed summary about those protocols. They have also compared those protocols using some features and performance metrics.