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A company wants to enforce source-specific multicasting (SSM) for several multicast streams. This is the configuration: Some multicast receivers support IGMPv3. Other receivers that need to stream support IGMPv2 only. The multicast receivers' default routers enable IGMPv3 on the interfaces associated with their subnets. The routers are correctly configured to enable the IGMPv3 receivers to receive the stream from the correct source Which setting do the receivers' routers require to support the IGMPV2 devices?
Correct Answer: D
Explanation/Reference: IGMP SSM mapping The IGMP SSM mapping feature provides SSM support for receiver hosts that are running IGMPv1 or IGMPv2. This feature is implemented by configuring static IGMP SSM mappings on the IGMP-enabled routers. The SSM model assumes that the IGMP-enabled routers have identified the desired multicast sources when receivers join multicast groups. * A host running IGMPv3 can explicitly specify multicast source addresses in its reports. * A host running IGMPv1 or IGMPv2, however, cannot specify multicast source addresses in its reports. In this case, you must configure the IGMP SSM mapping feature to translate the (*, G) information in the IGMPv1 or IGMPv2 reports into (G, INCLUDE, (S1, S2...)) information Reference: HP MSR Router Series, IP Multicast Configuration Guide(V7) http://h20565.www2.hp.com/hpsc/doc/public/display?sp4ts.oid=6796027&docId=emr_na- c04412136&docLocale=en_US