Инструкции По Установке для 3com S7906E

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Multicast Overview 
 
 
This manual chiefly focuses on the IP multicast technology and device operations. Unless 
otherwise stated, the term “multicast” in this document refers to IP multicast.  
EA boards (such as LSQ1GP12EA and LSQ1TGX1EA) do not support IPv6 features 
 
Introduction to Multicast 
As a technique coexisting with unicast and broadcast, the multicast technique effectively addresses the 
issue of point-to-multipoint data transmission. By allowing high-efficiency point-to-multipoint data 
transmission over a network, multicast greatly saves network bandwidth and reduces network load. 
With the multicast technology, a network operator can easily provide new value-added services, such 
as live Webcasting, Web TV, distance learning, telemedicine, Web radio, real-time videoconferencing, 
and other bandwidth- and time-critical information services.  
Comparison of Information Transmission Techniques  
Unicast  
In unicast, the information source (Source in the figure) needs to send a separate copy of information to 
each host (Receiver in the figure) that wants the information, as shown in