Real-Time Transfer Protocol lays a standard or a way to transfer or manage real time data over a network. It does not guarantee the delivery of data or provide any quality of service. However it helps to manage the data. Which means that RTP can be used deliver the necessary data to the application to make sure it can put the received packets in the correct order Real time data examples could be audio and video.

RTP multiplexing allows multiple media flows within a single RTP data payload between two points. This means that it can be used to carry multiple streams of data in one RTP packet. RTP multiplexing will reduce the bandwidth used. RTP multiplexing will also increase scalability.

Use of RTP and RTCP:-

1. RTP can be used to transfer Real time data like voice packets.
2. RTP can be used with RTCP which makes it possible to monitor data.
3. Packet loss can be detected by RTP using Sequence number

IP multicast technology reduces traffic by sending stream of information to many recipients at one go. Video conferencing, stock quotas are the examples based on IP multicast.

Multicast protocol or Internet protocol delivers a singles message to multiple machines. One packet from the source is replicated and sent to the destination. Every multicast message requires a multi case group. The group defines the addresses which will receive the message. The group is defined by the class D address. Different routing protocols are used to find the multicast groups and build routes for them. Distance Vector Multicast protocol is one of them. The receiver, to whom the multicast packet is sent to, needs to 'join' the group. Joining the group is enabled and managed by IGMP. Multicast routers are used to transmit the messages from one network to another.