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<strong>Multicast</strong><br />
<strong>iMPath</strong><br />
N e t w o r k s<br />
• <strong>Multicast</strong>. Allows sending one copy of each packet to the group of computers<br />
that want to receive it. <strong>Multicast</strong> can be implemented at the Ethernet linklayer<br />
or at the network layer (layer 3 of the OSI model). Computers join and<br />
leave multicast groups by using the IGMP (Internet Group Management<br />
Protocol) Each host can register itself as a member of selected multicast<br />
groups through use of the Internet Group Management Protocol (IGMP).<br />
• <strong>Multicast</strong> is commonly used in audio and video streaming applications.<br />
– It allows a single source of traffic to be viewed by multiple destinations<br />
simultaneously.<br />
– It is designed to provide an efficient transmission using the least amount<br />
of bandwidth on the network to save cost.<br />
• IGMP is a standard IP protocol supported by most LAN/WAN vendors in<br />
traditional LAN products, ATM, and gigabit Ethernet solutions.
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