题目内容

25. Does a router know exactly which hosts have joineda multicast group?

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26. Source-based vs. core-based multicast tree?(Compare their number o states and scalability.)

27. How many pieces o state inormation are kept inrouters or source-based and core-based multicastrouters, respectively? (Consider the numbers omulticast groups and sources.) What kinds o stateinormation might be kept?

28. Do multicast packets really f ow on the shortest pathin the reverse path multicasting in DVMRP?

29. What state inormation is kept in routers or thereverse path multicasting in DVMRP?