Summary: Multicasting is a fundamental communication paradigm in which the communication takes place over a network between a single sending node and multiple receivers. It is used in applications such as video-conferencing, distance learning, and transmission of corporate data and stock market trends. In less than 10 years, the MBone (Multicast Backbone of the Internet) has grown from a small network used by a few select people into a gigantic network that spans the globe. Today multicasting is an active area of research. This paper proposes two protocols for multicast communication, both based on queuing theory. The first one is a static, sender-based protocol that ensures all receivers view a multicast packet at the same time. The sender calculates the maximum time taken by a packet to reach the farthest node, and all receivers are forced to wait for that amount of time before viewing the packet. This can be used in applications like transmission of stock market trends, where it is essential that all clients view the data at the same time. The second protocol -- An adaptive protocol for multicasting using retransmission buffers -- employs retransmission buffers to ensure reliability of communication. In this protocol every node in the multicast group will store packets in the retransmission buffer. The duration for which a packet is stored in the buffer depends on the node's distance from the sender and the number of retransmission requests received by it. Thus, the buffering time varies from node to node and will be adapted to accommodate the reliability of the connection.