TRPB

v Truncated Reverse Path Broadcasting (TRPB) was developed to overcome the limitations of Reverse Path Broadcasting.

v With information provided by IGMP, multicast routers determine the group memberships on each leaf subnetwork and avoid forwarding datagrams onto a leaf subnetwork if it does not contain at least one member of a given destination group. Thus, the delivery tree is "truncated" by the router if a leaf subnetwork has no group members.

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