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Any-source multicast

Delivering multicast packets based only on destination address

Any-source multicast (ASM) is the older and more usual form of multicast where multiple senders can be on the same group/channel, as opposed to source-specific multicast where a single particular source is specified.

Any-source multicast allows a host computer to map IPs and then sends IPs to a number of groups via IP address. This method of multicasting allows hosts to transmit to/from groups without any restriction on the location of end-user computers by allowing any receiving host group computer to become a transmission source. Bandwidth usage is nominal allowing Video Conferencing to be used extensively. However, this type of multicast is vulnerable in that it allows for unauthorized traffic and denial-of-service attacks.

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.

Benefits

Scalability for large tasks
The reduction of group management
Ability to use existing technologies

References

(July 2003). "RFC 3569 - An Overview of Source-Specific Multicast (SSM)".
Bahlmann, B. (n.d.). ASM - Any Source Multicast. Retrieved January 25, 2011, from Birds-Eye.net: http://www.birds-eye.net/definition/acronym/?id=1164937805
Bestak, R., Simak, B., Kozlowska, E., Simek, M., Bürget, R., & Komosny, D. (2007). Experiences of Any Source and Source Specific Multicast Implementation in Experimental Networks. Personal Wireless Communications, 245, pp. 468-476.
Cui, J.-H., Maggiorini, D., Kim, J., Boussetta, K., & Gerla, M. (2002, March 26). A protocol to improve the state scalability of source specific multicast. Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE, 2, pp. 1899-1904. Los Angeles, CA.

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internet-architecture internet-broadcasting internet-protocol routing

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