Telematics Chapter 6: Network Layer - Freie Universität Berlin

How to realize Multicast with IPv4?
1. Transmission
Unicast
Receiver
Sender
2. Transmission
Receiver
Broadcast is a one-to-all transmission
Unicast is an end-to-end transmission between two hosts.
� Multiple transmissions have to be executed sequentially.
� For multicast, data is replicated by the network and
send in parallel.
� Inefficient use of time and capacities.
Problem with Unicast
and Broadcast:
How can a group of
computers be
addressed efficiently?
� A packet is sent to all possible receivers , many of them
may not need it
� Network load by use of transmission paths, which are
not needed actually
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 6: Network Layer
Broadcast
Receiver Receiver
Receiver
Sender
Receiver
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