Question: Most multicast routing protocols, such as MOSPF, minimize the path cost to each group member, but they do not necessarily optimize the use of the

Most multicast routing protocols, such as MOSPF, minimize the path cost to each group member, but they do not necessarily optimize the use of the Internet as a whole. This problem demonstrates this fact.

a. Sum the hop costs incurred by each packet involved in a multicast transmission of a source packet using the spanning tree of Figure 21.2a.

b. Design an alternative spanning tree that minimizes the total cost. Show the tree and the total cost.

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