This method of multicasting allows hosts to transmit to/from groups without any restriction on the location of end-user computers[1] by allowing any receiving host group computer to become a transmission source.
[2] Bandwidth usage is nominal allowing Video Conferencing to be used extensively.
[3] However, this type of multicast is vulnerable in that it allows for unauthorized traffic and denial-of-service attacks.
[2] Commonly, any-source multicast is used in IGMP version 2; however, it can also be used in PIM-SM, MSDP, and MBGP.
ASM utilizes IPv4 in association with the previously stated protocols; in addition, MLDv1 protocol is used for IPv6 addresses.