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Authors:
James F. Kurose, Keith W. Ross
Chapter:
The Network Layer
Exercise:
Review
Question:35 | ISBN:9780132856201 | Edition: 6

Question

What are the roles played by the IGMP protocol and a wide-area multicast routing protocol?

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Answer

IGMP is a protocol run only between the host and its first-hop multicast router.IGMP allows a host to specify (to the first-hop multicast router) the multicast groupit wants to join.It is then up to the multicast router to work with other multicastrouters (i.e., run a multicast routing protocol) to ensure that the data for the host-joined multicast group is routed to the appropriate last-hop router and from there tothe host.

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Discussions

Martin Emukuny

Consider a LAN to which ten host interfaces and three router interfaces are attached.  Suppose all three LANs use class C addresses. The IP addresses for the 13 devices will be identical in which of the first 32 bits?

Martin Emukuny

 

Consider a router with three interfaces. Suppose all three interfaces use class C addresses. Will the IP addresses of the three interfacess necessarily have the same first 8 bits?

Post the discussion to improve the above solution.