Both Multicast and Broadcast are one to many transmissions. The difference between the two is that Multicast requires Multicast Group to be in the same subnet for them to receive the data packets.
IGMP
The IGMP (Internet Group Management Protocol) contains the option to override defaults to disable Query Timeout within the Group Specific and the All Groups options.
Note: Disabling Query Timeouts can potentially lower the speed of the internet.
