Does a multicasting router need to know how many subscribers

Does a multicasting router need to know how many subscribers are on a network that it connects to for a multicast group? Explain.

Solution

No it doesn\'t require how many subscribers are on the network for a multicast group .multicast uses network infrastructure efficiently by requiring source to send a packet only once , even it needs to deliver to a large number of users or receivers. The nodes in the network take care of replicating the packet to reach multiple receivers such that messages are sent over each link of the network only once. Thus it doesn\'t need to know how many subscribers are on the network.