We saw in Section 4.7 that there is no network-layer protocol that can be used to identify the hosts participating in a multicast group. Given this, how can multicast applications learn the identities of the hosts that are participating in a multicast group?
Consider the Section 4.7 in the text book.
Assume there is no network-layer protocol that can be used to identify the hosts participating in a multicast group.
Then, the following stes are multicast applications learn the identities of the hosts that are participating in a multicast group: