What are broadcast and multicast data transmission services?
A. Broadcast transmission is the sending of information from one to all recipients; multicast is the sending of information from one to many, but not all, a subset of broadcast. The term broadcast is familiar to us all as it is the term used to designate radio or television transmissions over the airwaves. Radio and television broadcasts are sent one way to everyone with a radio or television set used to receive the information. Q. Why are broadcast and multicast data transmission services useful? A. There are two broad categories of applications that are fueling interest in multicast data services over wide area data networks. The first is for real time transmission of information that is put into the form of data, but is not computer data in the classical sense. A good example is desktop video conferencing, where specialized video conferencing equipment is not needed, but rather all participants use their desktop PC and windowing to see the participants. Data networks are also being
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