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We have seen in the previous two chapters how hosts indicate
their desire to join or leave a multicast group using the
Internet Group
Management Protocol
(IGMP) and how switches and routers exchange multicast information
using the Cisco
Group Management Protocol (CGMP). In this chapter, we begin our investigation of
multicast routing protocols, which are designed to efficiently
(hopefully!) determine a path from multicast sources to multicast
receivers. Before we jump into our first multicast routing protocol,
we must first illuminate the general differences between unicast and
multicast routing protocols. |
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