IGMP has three fundamental types of messages:
Message | Description |
| A message sent from the querier (IGMP router or switch) |
Query | asking for a response from each host belonging to the |
| multicast group. |
| A message sent by a host to the querier to indicate that the |
Report | host wants to be or is a member of a given group indicated in |
| the report message. |
Leave Group | A message sent by a host to the querier to indicate that the |
host has quit to be a member of a specific multicast group. |
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